Science Review 2

Science Review 2

Erosion of beaches

• The water erodes the coast of land

• A levee is used to catch the overflowing water to stop erosion

Multiple Choice

The leaders of a coastal town want to slow the erosion of a nearby beach. Which technology should they research?

• levees

• storm drains

• beach nourishment

Multiple Choice

A student carries out an investigation and records his steps and observations in the table. During which step does the student gather evidence that a chemical change occurs?

• Step 1

• Step 2

• Step 3

• Step 4

Microorganisms can be harmful or helpful

• Harmful: viruses like salmonella, ringworm, athlete's foot

• Helpful: penicillin, yeast, bacteria in yogurt.

Multiple Choice

Which statement supports the argument that some microorganisms are helpful?

• People use bacteria to make cheese.

• Many diseases are caused by viruses.

• Algae live in rivers, lakes, and oceans.

• Farmers spray their crops with chemicals to prevent the growth of fungi.

Multiple Select

The picture shows a landform. Which process MOST LIKELY formed this landform? Select TWO processes

• erosion by water

• deposition by ice

• volcanic eruption

• deposition by wind

• weathering by water

Multiple Choice

A chef examines and tastes several ingredients. Then she chops up the ingredients and combines them to make a salad. Which statement BEST describes the chef's actions?

• She makes a mixture.

• She makes a solution.

• She makes a new substance.

• She changes a state of matter.

Multiple Choice

A wolf pup follows its mother, plays with other pups, barks, and hides in a den. Which trait is MOST LIKELY an instinct?

• barking

• hiding in a den

• following its mother

• playing with other wolves

Multiple Choice

A student wants to increase the strength of an electromagnet. Which of these is a way to make the electromagnet stronger?

• replacing the iron core with a copper core

• replacing the copper wire with plastic wire

• wrapping the wire around the iron core fewer times

• increasing the electric current flowing through the wire

Multiple Choice

Which part of the circuit converts electrical energy into another form of energy?

• wire

• switch

• battery

• lightbulb

Multiple Choice

Which statement explains why the light bulb is not lit?

• The batter is dead, so there is no electrical source.

• The switch is open, so electric current cannot flow through the circuit.

• The light bulb requires more electrical energy than the batter can provide.

• The wires are not conductors, so electric current cannot flow through the circuit.