Science Review- Part 2

A ball is kicked and rolls along a level field until it comes to a stop. What is most responsible for the ball coming to a stop?

• air

• gravity

• mass

• friction

If a car is moving backward along a road, can its speed be measured?

• Yes, it can, because the car does not have friction acting on it.

• Yes, it can, because the car travels a distance in a certain amount of time.

• No, it cannot, because the speed can only be measured if the car is moving forward.

• No, it cannot, because the distance traveled backward by a car cannot be measured.

Scientists discover an asteroid that is moving through space. What information is needed to determine the average speed of the asteroid?

• the mass and size of the asteroid

• the distance the asteroid is from Earth

• the direction the asteroid is moving and its distance from Earth

• how far the asteroid has moved in 24 hours

One morning, a student notices that the grass in the are is wet, although it had not rained during the night. What could have caused the grass to be wet?

• During the night, water had evaporated from the trees in the area

• The air above the ground became warmer during the night and caused precipitation

• When the air cooled above the ground during the night, water vapor condensed on the grass

• The grass soaked up water from the ground during the night

Two liquids are poured together, and a solid substance forms with no liquid remaining. Liquid 1 has a mass of 200 grams, and liquid 2 has a mass of 100 grams. What would be the total mass of the solid substance formed?

• 100 grams

• 150 grams

• 250 grams

• 300 grams

Which is the best example of a new substance forming?

• lighting a match

• cutting a piece of paper

• popping a balloon

• hitting a nail with a hammer

Stirring a cup of hot tea causes a metal spoon to get warm. Which statement best explains why the spoon gets warm?

• Heat energy transfers from the metal spoon to the hot liquid

• Heat energy transfers from the hot tea to the spoon

• Heat energy transfers from the air to the hot liquid, and then to the spoon.

• Heat energy transfers from the hot liquid to the cup, and then to the spoon

Which material is best used to keep cold drinks from getting warm too quickly?

• glass, because it is a good conductor of heat

• foam, because it is a poor conductor of heat

• metal, because it radiates heat

• paper, because it conducts heat

Which best describes the cause of day to day weather changes?

• the rotation of Earth

• the size of Earth

• moving air masses

• action of the winds

Students report that the sky in their area has mostly cirrus clouds. What are most likely the weather conditions in the area?

• rainy

• cold

• windy

• fair