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WorksheetsScience Busters
Total questions: 40
Worksheet time: 26mins
The powerhouse of the cell is called?
cell wall
mitochondria
ribosomes
nucleus
The functional unit of life is called?
cell
egg
nucleus
none of these
chloroplast is found in...
plant cell only
animal cell only
both of these
none of these
The control unit of cell is
nucleus
cell wall
cytoplasm
all of these
Single celled organisms are called...
unicellular
multi-cellular
both of these
none of these
Tissue is a...
group of organs
group of cells
group of tissues
group of organisms
Hen's egg is a...
tissue
organ
organ system
cell
What is force?
pull
push
both of these
none of these
The strength of force is expressed by?
weight
mass
magnitude
longitudinal force
The force between two charged bodies is called...
muscular force
gravitational force
magnetic force
electrostatic force
Magnetic force is...
contact force
non-contact force
both a and b
none of these
Force acting on an object may change...
direction
shape
speed
all of above
Leaves or fruits fall on the ground due to...
magnetic force
gravitational force
electrostatic force
muscular force
The cell formed after fertilization is called...
foetus
zygote
embryo
none of these
How many modes of reproduction are these in animals?
one type
two types
three types
four types
A sperm cell is a...
female gamete
male gamete
developed zygote
non of the above
Cloning is a mode of...
sexual reproduction
asexual reproduction
both of these
none of these
Which gas is in highest percentage in the air?
oxygen
carbon dioxide
nitrogen
argon
The beauty of Taj Mahal is being affected by...
noise pollution
water pollution
air pollution
none of these
Air pollution causes...
global warming
respiratory problems
soil erosion
all of these
Green house gas is...
nitrogen
oxygen
carbon dioxide
argon
Chlorofluorocarbon (CFC), gas that affects the ozone layer, is used in...
refrigerators
air conditioners
perfumes
all of these
Dropping a penny from the empire state building could seriously injure a person on the ground.
True
False
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.
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.
