WorksheetsScience Review
Total questions: 10
Worksheet time: 10mins
Humans use plastic products and produce large quantities of plastic waste. This waste ends up in landfills and oceans, causing further harm to the environment.
Which would be the best for the environment and a long-term solution to reduce the amount of plastic waste that ends up in landfills and oceans?
gathering and burning the plastic waste twice a year
replacing plastic with materials that naturally break down to form soil
making new plastic products from stronger plastic
storing plastic waste in large containers above ground
A student classifies the decay of a plant over time as a chemical change. Is the student correct, and why?
No. The decay of a plant is reversible.
No. The decay of a plant creates a new material.
Yes. The decay of a plant is reversible.
Yes. The decay of a plant creates a new material.
Copernicus developed his solar system model after Ptolemy. The image shows Copernicus’s model of the solar system.
Which theory led to the proposal of this new model?
The stars revolve around the Sun.
The stars revolve around Earth.
The Sun and all the other planets revolve around Earth.
The Earth and other planets revolve around the Sun.
A student observes a burning candle.
The wick of the candle burns and gives off heat and light.
-The candle flame glows red and orange.
-Some wax starts to melt and drips down to the bottom.
-Black smoke is given off after the candle flame is blown out.
Which is a physical change that happens when a candle burns?
burning of the wick to give off heat and light
glowing red and orange colors of the candle’s flame
melting of candle wax that drips down to the bottom
releasing of black smoke when flame is blown out
A student claims that telescopes play an important role in exploring. Which use of telescopes supports the student’s claim?
Telescopes help predict weather conditions on Earth.
Telescopes help find new planets, stars, and galaxies.
Telescopes help collect gases from the Sun.
Telescopes help move asteroids away from Earth.
Which planets have rocky surfaces?
Earth, Mars, and Neptune
Earth, Mars, and Neptune
Earth, Jupiter, Mercury, and Neptune
Earth, Mars, Mercury, and Venus
Which best describes a relationship between atoms and molecules?
Atoms combine to make molecules.
Molecules combine to make atoms.
Molecules are all the same, while atoms are all different.
Atoms are all the same, while molecules are all different.
A person observes that when the front porch of a house is wet, it is very slippery. The person adds sand to a paint can and repaints the porch’s surface.
How will the new paint make the porch safer?
The new paint will decrease the effect of friction on the porch’s surface.
The new paint will increase the effect of friction on the porch’s surface.
The new paint will decrease the amount of liquid that lands on the porch’s surface.
The new paint will increase the amount of liquid that lands on the porch’s surface.
A student shares a snack mix that includes peanuts, pretzels, popcorn, and cheese crackers with a friend. The friend eats all the peanuts, then all the pretzels, then all the popcorn, and finally all the cheese crackers.
Which property of a mixture allows the friend to eat each part of the snack mix one food type at a time?
The different parts of a mixture can be evenly mixed.
The different parts of a mixture can be different types of matter.
The different parts of a mixture can be in different amounts.
The different parts of a mixture can be separated by physical means.
A scientist observes high levels of harmful nutrients in a river after a month of heavy rain. The scientist thinks a filtration system could protect the river.
Which step should the scientist perform next?
The scientist should build a filtration system at the narrowest part of the river.
The scientist should design a filtration system to remove the harmful nutrients.
The scientist should gather information about the filtration system to find problems.
The scientist should improve the filtration system to catch smaller particles.
