What pulls objects to the center of the Earth?

• the sun

• the moon

• the tides

• gravity

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NGSS.5-PS2-1

Kayla has a wooden rod, a steel rod, and a glass rod. How could she compare the materials to find out which transfers thermal energy BEST?

• Submerge each rod in ice water to find out which loses the most heat.

• Place the three rods in a freezer to find out which becomes the coldest

• Place one end of each rod in very hot water to find out which becomes hot the fastest

• Place the rods on a table in a warm room and find out which feels warmest after a period of time

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Which best describes an example of heat transfer through radiation?

• getting warm in front of a portable heater

• burning your finger on a curling iron

• ironing a dress shirt and tie

• cooking soup on the stove

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Which is an inherited characteristic on a horse?

• a long mane

• a steel shoe

• a missing tooth

• a bruised leg

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The picture shows a polar bear. Which change in the environment would MOST likely decrease the ability of this animal to survive?

• increase in Earth’s temperature

• decrease in Earth’s temperature

• increase in yearly rainfall

• decrease in yearly rainfall

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Which of the following is an example of a chemical change?

• clouds forming

• sugar dissolving

• water freezing

• a candle burning

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Which two human body systems are MOST responsible for getting oxygen to cells?

• digestive and skeletal

• skeletal and circulatory

• circulatory and respiratory

• respiratory and digestive

The Sun releases light and heat energy that cause changes on Earth. How does the Sun’s energy change water?

• The energy makes liquid water freeze.

• The energy makes water vapor from liquid water

• The energy makes clouds release rain

• The energy makes water collect into puddles

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What keeps Earth in orbit around the Sun?

• the inertia of the Moon

• the location of Earth’s orbit

• the speed of Earth’s rotation

• the Sun’s gravitational pull

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Otto pushed a toy car across a floor. The car traveled fast across the wood, but it slowed to a stop on the carpet. Which BEST explains what happened when the car reached the carpet?

• Inertia decreased.

• Gravity increased

• Friction increased.

• Magnetism decreased

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NGSS.3-PS2-1