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WorksheetsSECME Practice
Total questions: 87
Worksheet time: 44mins
Two wires carrying electricity can create a spark if they come too close together. This spark can start a fire. Wires carrying electricity are usually covered with plastic to keep them from starting a fire. Why does the plastic keep the electricity from starting a fire?
Plastic is a good insulator.
Plastic is softer than wire.
Plastic can melt when heated.
Plastic conducts electricity.
A teacher gives a student four clear sealed containers. Each container holds a different substance. The student records some observations about the substance in each container.
Container 1: The substance takes the shape of the container and is clear. Small particles float on top of the substance.
Container 2: The substance is hard and cube-shaped. The surface of the substance is shiny.
Container 3: The substance is not visible, and the container appears empty.
Container 4: The substance is cold and made of crystals.
Based on these observations, which container most likely holds only gas?
Container 1
Container 2
Container 3
Container 4
Which of these is the best conductor of electricity?
Glass rod
Cotton string
Plastic tubing
Copper penny
A teacher mixes a white powder into a beaker of water. The powder cannot be seen in the water. The teacher then heats the mixture until the water evaporates and the powder can be seen again. Which property of the powder is the teacher demonstrating?
Solubility
Density
Conductivity
Mass
A student measures the temperature of water being heated on a hot plate. The student observes that the temperature of the water is 53°C. How many more degrees Celsius must the temperature rise before it reaches the boiling temperature of water?
159°C
69°C
20°C
47°C
A student observed liquid wax dripping down the side of a burning candle. After putting out the candle's flame, the student left the room. Several hours later the student observed that there was no longer any liquid on the side of the candle. Which statement explains what most likely happened to the liquid wax?
The heat given off by the flame caused the candel wax to evaporate.
The liquid wax changed back into a solid as it cooled.
The liquid wax condensed and was absorbed by the candle.
None of the above
Some people add sugar to their hot tea. Which property of the sugar remains the same when the sugar is in the tea solution?
The taste of the sugar
The size of the sugar crystals
The color of the sugar
The texture of the sugar
Which of these is not soluble in water?
Oil
Salt
Honey
Sugar
Objects that blow into a swimming pool or that are dropped into the pool by swimmers need to be removed. These objects include foam cups, keys, and coins. Which of the following explains a useful method for removing some of these objects?
The keys and coins are less dense than water, so they can be easily picked up off the bottom of the pool by divers.
The foam cups have the same density as water, so they can be crumpled up for removal by the pool filter.
The foam cups are less dense than water, so they can be removed from the surface with a pool cleaning net.
The keys and coins have the same density as water, so they can be washed away when the pool is drained.
Cracks in the seafloor called hydro-thermal vents send streams of hot water into the ocean. The water from a vent is 387°C. How many degrees above the boiling point of water is this temperature?
175°C
287°C
387°C
487°C
A student adds 10 grams of four different powdered solids into four different beakers. The student then adds 100mL of water to each beaker, stirs the mixtures, and allows them to sit for half an hour before recording observations. Which question is the student most likely trying to answer with this investigation?
At what water temperature do the substances dissolve?
How much water is needed to cause a substance to change state?
What causes a substance to sink when put in water?
Which substances dissolve in water?
A teacher wears protective gloves to lift a metal pan filled with boiling water from a hot plate. Why are the protective gloves necessary?
The metal pan creates thermal energy.
The metal pan insulates thermal energy.
The metal pan conducts thermal energy.
The metal pan reduces thermal energy.
A student fills two identical beakers with the same volume of water. The student places on beaker in the freezer and the other beaker on a hot plate. After 5 minutes the student observes that the temperature of the water in the freezer is 19°C and the temperature of the water on the hot plate is 42°C. Which statement best describes the relationship between the two beakers of water and the freezing and boiling point of water?
The temperature of the water on the hot plate must increase 58°C before it boils, and the temperature of the water in the freezer must decrease 32°C before it freezes.
The temperature of the water on the hot plate is closer to the boiling point than the temperature of the water in the freezer is to the freezing point.
The temperature of the water in the freezer must decrease by 19°C before it freezes, and the temperature of the water on the hot plate must increase 170°C before it boils.
The temperature of the water in the freezer is closer to the freezing point than the temperature of the water on the hot plate is to the boiling point.
A student combined powdered paint with water to make a small amount of a blue liquid paint mixture. The student left the paint mixture in a open container. Several days later the student found the container and observed that changes had occurred. What most likely happened to the mixture?
The container was empty after the mixture evaporated into the air.
The paint evaporated, leaving only clear water in the container.
The water evaporated, leaving only a dry blue solid in the container.
The liquid paint mixture was lighter in color after some water evaporated.
Some students put two ice cubes on separate plates. One ice cube had a mass of 80 grams. The other had a mass of 40 grams. Which result would be the same for both ice cubes in this investigation?
The time it took each ice cube to melt completely.
The temperature at which each ice cube melted.
The amount of liquid produced on each plate.
The total volume of each ice cube.
A student made a mixture using equal amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should each student do to most easily separate the pepper from the salt?
Use a pair of tweezers to remove each grain of pepper.
Run a small magnet through the mixture to attract the pepper.
Put the mixture in water and filter the pepper out of the water.
Use a strainer with a fine wire screen to remove the pepper.
When a powdered drink mix was added to water, the liquid turned orange. A student decided the taste was too strong, so he poured out half of the liquid and added more water. Which of the following most likely occurred when more water was added?
The physical state changed.
The orange color became lighter
The liquid had a sweeter taste.
None of the above
A student uses a set of headphones to listen to music. Which type of these objects uses the same source of energy as the headphones?
A flute using wind energy
A piano using mechanical energy
A keyboard using electrical energy
A teapot using thermal energy
When a bat searches for prey at night, it makes sounds as it flies, and it uses the sounds' echoes to find its prey. When the bat flies and listens to echoes to locate prey, it is using -
thermal energy and light energy
sound energy and thermal energy
mechanical energy and sound energy
light energy and mechanical energy
Which of these best demonstrates the reflection of light?
Looking through the glass of a large window.
Looking at an image formed on a silver spoon.
Looking at a lightbulb that is glowing.
Looking at a star on a clear night.
How are rainbows made?
They are pretty
lIght reflects off of the water making a rainbow.
y=mx+b
They come when it snows.
How far away is the sun? (Rounded)
74 million mi
73 million mi
92 million mi
67 million mi
The chart gives the physical properties of copper. How does the density of a 4g sample compare to that of a 12g sample?
It is twice as dense as the 12g sample.
It is 3 times as dense as the 12g sample.
The density is one-half the density of the 12g sample.
The densities are the same.
What is the most common term used in genetics to describe the observable physical characteristics of an organism caused by the expression of a gene or set of genes?
Phenotype
Photosynthesis
DNA
Genetics
The overall charge at the top and bottom, respectively, of a towering cumulonimbus cloud during a thunderstorm is:
positive, positive
positive, negative
negative, positive
negative, negative
Subtract the following 2 numbers and give your answer with the proper significant figures: 25.101 – 0.9608
19.089
28.90
24.140
8.28
What is the proper name of the star that is most commonly noted to have coordinates closest to the north celestial pole?
North Star
Sun
Polaris
Alpha Ursa Minoris
What is the most well-known asterism in Ursa Major?
Jupiter
Milky Way
Sun
Big Dipper
What is the most common term for the energy an object has because of its position or configuration?
Kinetic
Potential
Friction
Newton's 1st Law
Which one of the four basic forces of the universe is most directly involved with maintaining the planets in their orbits?
Gravity
Carbon Dioxide
Oxygen
Air
What is the kelvin temperature that represents a condition of no molecular motion?
0
32
14
25
Which of the following will occur when an unbalanced force acts on an object?
Friction
Balanced
No motion
The object will accelerate
What is the light-yellow fluid that makes up the fluid portion of normal circulating human blood?
Serum
Plasma
Gas
Liquid
What is the most common element in most steel?
Basalt
Copper
Steel
Iron
Which is considered a good insulator of heat?
aluminum, because it allows heat to flow easily
glass, because it allows heat to flow easily
plastic, because heat is unable to flow easily
silver, because heat is unable to flow easily
Why are there high and low tides on Earth?
They are due to changes in the moon’s tilt on its axis.
They are due to changes in the moon’s speed every month.
They are due to the magnetic force between Earth and the moon.
They are due to the gravitational pull between Earth and the moon.
Which is the basic composition of Earth’s core?
The solid inner core is surrounded by a liquid outer core.
The liquid inner core is surrounded by a solid outer core.
Both the inner core and the outer core are solid.
Both the inner core and the outer core are liquid.
Which best explains the movement of tectonic plates?
They move several kilometers each year because of convection within Earth.
They move several feet each year because of convection within Earth.
They move several miles each year because of convection within Earth.
They move several centimeters each year because of convection within Earth.
Tulips are flowers that typically bloom in the spring. How could tulips be forced to bloom in winter?
by limiting pruning and trimming of the tulips
by increasing temperature and lengthening daylight for the tulips
by elevating oxygen levels and supplying organic matter to the tulips
by reducing water levels and nutrient uptake by the tulips
How does sound usually travel?
An object vibrates, and those vibrations travel through the air in one direction as transverse waves.
An object vibrates, and those vibrations carry air in all directions as transverse waves.
An object vibrates, and those vibrations carry air in one direction as longitudinal waves.
An object vibrates, and those vibrations travel through the air in all directions as longitudinal waves.
Which is true for every atom of an element?
It has mass and volume.
It is joined together with another atom.
It is weightless.
It can be seen with a magnifying glass.
A student has two pieces of aluminum foil. Each piece can be folded and rolled into a wire. Why do both pieces of aluminum foil behave the same way?
They are composed of different types of atoms.
They have the same physical properties, but different chemical properties.
They are composed of the same types of atoms.
They have the same chemical properties, but different physical properties.
Why does sound travel faster through a solid object than in the air?
The atoms in the solid object are farther apart than the atoms in the air.
The atoms are smaller in the solid object than the atoms in the air.
The atoms are larger in the solid object than the atoms in the air.
The atoms in the solid object are closer together than the atoms in the air.
Beaker X contains 100 g of table salt and beaker Y contains 50 g of table salt. How do the contents in beaker Y compare to those in beaker X?
Both have the same solubility.
Both have different melting points.
Both have different elements.
Both have the same weight.
Why are people able to see the moon?
The moon produces its own light.
Light from the sun reflects off the moon.
Light from Earth reflects off the moon.
The moon is located between Earth and the sun.
Where are earthquakes most likely to occur?
In the middle of plates
In the oceans
Along plate boundaries
Anywhere on the Earth
Why does the Earth orbit the Sun and not a planet in the solar system?
The Sun is more massive than the planets so it's mass causes the gravitational pull.
The Earth pulls the Sun toward it because it is so massive.
It just happened that way.
The Earth is closer than the other planets so the distance causes the gravitational pull.
Which best describes the role of the water cycle?
Evaporation
reduces pollution in most of the water
increases usable supply of Earth’s water
circulates existing water on Earth
The tendency of an element to react with other elements to produce compounds.
Chemical change
Reactivity
Neutrality
Valence
A subatomic particle that has almost no mass and a negative charge.
Electricity
Electron
Proton
Neutron
What is the most common term used in genetics to describe the observable physical characteristics of an organism caused by the expression of a gene or set of genes?
Genotype
Phenotype
Alleles
Species
What is the biological term most often used for the act of a cell engulfing a particle by extending its pseudopodia (read as: SU-doe-POH-dee-ah) around the particle?
Ingestion
Pseudopedia
Phagocytoses
Cytophytoses
An aqueous solution in which the concentration of OH– ions is greater than that of H+ ions is:
Basic
Acidic
Neutral
Equilibrium
The overall charge at the top and bottom, respectively, of a towering cumulonimbus cloud during a thunderstorm is:
Positive, Positive
Positive, Negative
Negative, Positive
Negative, Negative
A lightning bolt is seen and its accompanying thunder is heard 15 seconds later. This means the storm is most likely how many miles away:
3 miles
6 miles
9 miles
15 miles
How many significant figures are in the number 0.00750?
2
3
4
5
What is the most well-known asterism in Ursa Major?
Perseus
North Star
Big Dipper
Little Dipper
A constant force acting on a body experiencing no change in its environment will give the body:
Constant Acceleration
Constant Speed
Constant Velocity
Equilibrium
Which of the following is a sedimentary rock:
Slate
Marble
Basalt
Breccia
Which of the following is closest to the meaning of the suffix ‘lith’:
Outside
Stone
Side
Surface
Besides our Sun, what star has the greatest apparent magnitude?
Polaris
Betelguese
Sirius
Aldeberan
Which of the following plants is NOT a dicot?
Wheat
Rose
Lima Bean
Pea
Which of the following is a metallic element, composes about 5% of the Earth’s crust, oxidizes very easily, and when pure is a dark, silver-grey metal:
Cobalt
Iron
Nickel
Titanium
In general, metals are relatively hard except for what group of metals in the Periodic Table?
Group 1
Group 2
Group 3
Group 4
Mary and Joe are on a merry-go-round. Mary is seated near the center of rotation and Joe is on the outer edge. The merry-go-round turns at a constant 20 rotations per minute. Which of the following BEST describes their motion:
Mary has a greater acceleration than Joe
Joe has a greater acceleration than Mary
Both Mary and Joe have the same acceleration
Neither Mary nor Joe have any acceleration
In degrees Celsius to the nearest whole number, what is the normal core body temperature of a human being?
99
25
310
37
According to standard chemical nomenclature and indicating the proper charge, what is the formula for hydrogen sulfide?
H S
H S2
H2 S
H2 S O4
