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Worksheets8th grade FSSA questions
Total questions: 42
Worksheet time: 21mins
Why is photosynthesis important to consumers?
consumers use oxygen and glucose produced by photosynthesis
consumers supply the light energy needed for photosynthesis
consumers supply the water needed for photosynthesis
consumers supply the chloroplasts to producers
where does energy first come into an ecosystem?
producers make energy
the sunlight provides energy to producers
consumers obtain energy from animals
scavengers obtain energy from dead plants
How does CO2 in the atmosphere eventually cycle through to a carnivore?
plants use CO2 in the atmosphere during photosynthesis, herbivores eat the plants, and a carnivore eats an herbivore
carnivores use CO2 in the atmosphere during cellular respiration
herbivores use CO2 during photosynthesis and carnivores eat an herbivore
plants use CO2 in the atmosphere during photosynthesis and a carnivore eats the plant
How do plants convert glucose to energy?
through photosynthesis
when an animal consumes them
through cellular respiration
they do not convert glucose to energy
Lucy is constructing a model of the carbon cycle. Which components should she include in her model?
the sun, the atmosphere, and the ocean
fossil fuels, power plants, and electricity
the atmosphere, decomposers, and the geosphere
the atmosphere, the geosphere and the cryosphere
What is a scientific question that can be tested?
What is electricity?
Which is the nicest color for rose plants?
How many pine trees are in a tundra forest?
Does water heat up more quickly than sand in sunlight?
A scientist is raising the temperature of a sample of water to find out if the amount of salt that can be mixed into water changes. Which is the independent variable in this investigation?
the amount of water in the sample
the temperature of the water
the amount of salt that mixes in the water
the type of salt mixed into the water
Which must be true of any hypothesis for it to be useful in a scientific investigation?
It must be supported by data
it must be used to develop a theory
it must lead to further investigations
must be developed without depending on prior investigations
What is the final step while conducting a scientific investigation?
- ask question
- form hypothesis
- experiment
- analyze results
- ?
develop a theory
draw a conclusion
select equipment
identify the variable
Which best describes an experiment?
a scientist measures the height of crops that received different fertilizers
scientist measures the speed at which an eagle travels while it is hunting
scientist measures the diameter of a certain type of tree throughout a forest
scientist measures the rate at which a population of wild insects reproduces
Which is true about density?
possible unit for density is grams
liquid gold is denser than solid gold
density is found by multiplying mass and volume
density is independent of the amount of the sample
A student measured the volume of three rocks.
Rock A- 200 g, 150 cm3
Rock B- 240 g, 120 cm3
Rock C- 145 g, 130 cm3
Which correct orders the rocks from least to greatest density?
Rock A, Rock B, Rock C
Rock C, Rock A, Rock B
Rock B, Rock C, Rock A
Rock A, Rock C, Rock B
What is the melting point of a substance?
when its temperature changes from a gas to a liquid
when its temperature changes from a liquid to a solid
when its temperature changes from a liquid to a gas
when its temperature changes from a solid to a liquid
Which physical property is the rate at which a substance transfers heat?
boiling point
density
electrical conductivity
thermal conductivity
Lisa is using a magnet to pick up various objects. Which object is not attracted to her magnet?
cobalt
iron
nickle
wood
Which best describes how to classify water?
it is an element because it is made from a pure substance
it is a compound because it is made of a single kind of molecule
is is a mixture because it is a composed of more than one molecule
it is a solution because it is a homogeneous mixture of different compounds
which best describes an acid?
a soapy substance that is nonreactive with metals
a neutral substance made of oppositely charged particles
a caustic substance that has a high number on the pH scale
a sour liquid that forms gas bubbles when mixed with copper
Which is not a property of an acid?
tastes sour
has a high pH
reacts with metals
contains the element hydrogen
Magnesium (Mg), Calcium (Ca), and Barium (Ba) are all in the same group on the periodic table. What do these elements have in common?
They all have the same atomic number
they all have the same number of electrons
they all react with substances in similar ways
they were all discovered by Dmitri Mendeleev
Which is not a chemical change?
iron combines with oxygen to form rust
wax melts as it absorbs heat from a flame
pure sodium explodes when dropped in water
glucose molecules are produced in a plant leaf
Which is evidence that a physical change has occurred?
two substances separate after they are mixed
an old rubber band becomes stiff and brittle
a blue powder-like substance forms on a battery
a sealed bag filled with powder and water expands
A student dissolves 5 g of table salt in 100 mL of water in a beaker. Compared to the total mass of the salt and water before mixing, which is true?
a total mass of the solution will increase by a small amount
the total mass of the solution will increase by a large amount
the total mass of the solution will decrease by a small amount
the total mass of the solution will neither increase nor decrease
Which is true about a physical change to a substance?
the atoms in a substance will divide
the mass of a substance will increase
new substances will likely be formed
the substances will have the same properties
Trini adds 10 g of baking soda to 100 g of vinegar. The mixture begins to bubble. When the bubbling stops, Trini finds the mass of the resulting mixture. She determines the mass is 105 g. Why has the mass changed?
a gas has formed and left the mixture
vinegar evaporated during the experiment
mixtures are always less massive than their parts
matter was destroyed when vinegar reacted with baking soda
The average distance from the Earth to the sun is about 149.6 x 10^6 km. Proxima Centauri the nearest star is about 39.9 x 10^12 km away. Which statement is the most accurate?
the sun is many hundreds of times closer to Earth than it is to Proxima Centuari
the sun is many thousands of times closer to Earth than it is Proxima Centuari
the sun is many hundreds of times closer to Proxima Centuari than is it to Earth
the sun is many thousands of times closer to Proxima Centauri than it is to Earth
The star Aldebaran is an orange giant star in the constellation Taurus, the bull. Aldebaran is the eye of the bull, is about 65 light years away. What would happen if Aldebaran were to explode tonight?
we would see the explosion before we hear it
we would see the explosion right away
we would see the explosion in 65 years
we would never be able to see the explosion
Which correctly orders the relationship from least to greatest in size?
galaxy, planet, solar system, universe
planet, galaxy, universe, solar system
universe, galaxy, solar system, planet
planet, solar system, galaxy, universe
Phil explained to his classmates that there are a very large amount of galaxies in the universe. Which answer best describes how many galaxies there are in the universe?
billions
millions
thousands
hundreds of millions
How far is the sun from the center of the Milky Way?
on the very edge of the disc
half way from the galactic core to the edge of the disc
in the center of galaxy
two-thirds from the galactic core to the edge of the disc
Which is true about the sun?
the sun is the largest star in the Milky Way galaxy
the sun is the closest star to Earth in all galaxies
the sun has the highest surface temperature of all stars in the Milky Way galaxy
the sun has the highest absolute brightness of all stars in the Milky Way galaxy
Why does a star, such as Betelgeuse, have a much greater absolute magnitude than apparent magnitude?
absolute magnitude is relative to the sun
apparent magnitude does not take into account the distance from Earth
absolute magnitude does not take into account the distance from Earth
Betelgeuse is closer to Earth
Which has the hottest temperature?
a blue star
a red giant
the left over energy from the big bang
a swirling accretion disk of matter orbiting a black hole
The sun does not rotate in the same way the Earth does. The sun has different periods of rotations at different latitudes. Which latitude does the sun rotate the fastest?
highest latitude
middle latitude
lowest latitude
Looking at the distances from the sun and the orbital period, which infers the relationship between these properties?
as distances from the sun increases, the orbital period increases
as distances from the sun increases, the orbital period decreases
as distances from the sun decreases, the orbital period increases
there is no consistent relationship between the two
Which statement correctly compares the force of gravity between planets?
the force of gravity on Mars is greater than the force of gravity on Uranus
the force of gravity on Earth is greater than the force of gravity on Jupiter
the force of gravity on Saturn is equal to the force of gravity on Neptune
the force of gravity on Venus is equal to the force of gravity on Uranus
Based on the information given about atmospheres, which inference can be drawn? (use prior knowledge!)
presence of an atmosphere determines the presence of life
presence of an atmosphere does not determine the presence of life
the atmosphere of a planet becomes thicker as it is further distance from Earth
the atmosphere of a planet becomes thicker as it is a further distance from the sun
Which orders the orbital period, from least to greatest?
Earth, Mercury, Mars, Uranus
Mercury, Earth, Mars, Uranus
Mars, Mercury, Earth, Uranus
Uranus, Mars, Earth, Mercury
This diagram shows Earth's orbit. At what position is the autumn in the Southern Hemisphere?
Position 1
Position 2
Position 3
Position 4
Maria lives in Miami, Florida, where the weather is very warm most of the year. Her grandparents live in Canada where they have very cold winters. Which best explains why the seasons are so different?
parts of Earth closer to the equator do not experience as many seasonal changes
parts of Earth closer to the equator receive indirect rays from the sun all year long
parts of Earth farther away from the equator do not experience many seasonal changes
parts of Earth farther away from the equator receive indirect rays from the sun all year long
The diagram shows the position of the Earth, moon and sun at neap tide. Which areas experience low tides when the sun, Earth, and the moon are arranged in these positions?
A and C
A and D
B and C
B and D
Which correctly describes the impact of a lunar eclipse?
the Earth casts a shadow on the sun
the Earth casts a shadow on the moon
the moon casts a shadow on the sun
the moon casts a shadow on the Earth
Why do moon phases repeat about every 28 days?
the period of rotation of the moon is the as its period of revolution
the moon takes about 28 days to revolve around the Earth
28 days is the period of a complete cycle of tides
cloud-cover patterns on Earth last 28 days
