Weekly Quiz 24

Which answer describes how a pulley works?

• helps to turn or move things easier

• operates on a fulcrum

• lifts or pulls objects using a rope wrapped around a wheel

If some of the soda in a glass is poured into another glass, what about the soda will change?

• smell

• volume

• color

• taste

What are the observable characteristics of an object called?

• materials

• matter

• predictions

• physical characteristics

Fossil fuels were formed from:

• sunlight and rocks

• decayed plants and animals

• coal

• oil

Which of these choices are a good way to conserve water at at home?

• take long showers

• let the water run while brushing your teeth

• leave your lawn sprinklers on overnight

• run the dishwasher only when it's full

What is one possible cause of air pollution?

• tearing down a forest

• pouring oil into a storm drain

• over fertilizing a field

• burning trash

Which ecosystem has trees with leaves that fall to the ground in autumn, deer, squirrels, and some animals migrate in the winter?

• desert

• forest

• rainforest

• grassland

Dan's car is leaking oil. Why is it so important for him to fix this problem quickly?

• The oil is an eye sore

• The oil can pollute soil and water

• His tires will slip on the oil

• Dan's neighbor hates oil

What is the energy source for the water cycle?

• water

• wind

• sun

• electricity

What part of the water cycle occurs when water turns back to a liquid?

• collection

• evaporation

• condensation

• precipitation