A scientist is studying changes in the shape of a river. The scientist is interested in how rivers change course. Which of the following is the BEST way for the scientist to observe these changes?

• recording the river with a video camera for one whole day

• taking a picture of the river once a year for many years

• taking a picture of the river once a day for several weeks

• following the river on a kayak for a couple of days.

Tags

NGSS.MS-ESS2-2

Students observed the two rocks . Which of the following statements could a student add to his/her journal that BEST compares the two rocks observed?

• Rock 1 has been weathered more than Rock 2.

• Rock 2 has been weathered more than Rock 1.

• Rock 1 and 2 have been weathered the same amount.

• Rock 1 has less mass than Rock 2.

A lot of people are trying to conserve natural resources by using new technology. One of the new technologies is solar power. Which of the following natural resources would solar power have the most direct effect on for the conservation of natural resources?

• Fossil Fuels

• Soil

• Air

• Animals

Which describes the texture of a soil that BEST prevents water from flowing through?

• coarse and loose

• soft and spongy

• fine and tightly packed

• well mixed, not too coarse or fine

Thomas Edison a scientist, was known as one of America's greatest inventors, for creating the electric light bulb?

• True

• False

Buoyancy, the ability to float, can be tested in _______.

• soil

• water

• rock

• wood

If Beaker 1 contains salt water and Beaker 2 contains sugar water. Which of the following does NOT describe the solutions in the beakers?

• Both solutions are liquids.

• The solutions are solids.

• They contain material dissolved in water.

• The solutions have the same volume.

Copper wires are great conductors of electricity and are used to carry currents throughout homes. Around the outside of the wire is a plastic coating. What property does the plastic have that makes it a useful coating around the copper wires?

• Electrical conductor

• Thermal conductor

• Electrical insulator

• Thermal insulator

Which of the light bulbs would light up in the diagrams below?

• A

• B

• C,D

Some students wanted to see if a toy car on an oily surface travels faster than a toy car on a non–oily surface. They used two ramps–one covered with oil and one without oil. The students released a model car on each ramp once. The students should test each ramp three more times to —

• write a hypothesis

• get accurate data

• analyze their procedure

• display their results

Tags

NGSS.3-5-ETS1-3

NGSS.3-PS2-2