Science Pass

How are canyons created?

• children dig them

• by weathering and erosion

• dogs dig them to put their bones in

• oceans make them

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If Carol poured 500 mL of water into the soil and 400 mL can now be found in the jar, then the other 100 mL must have been-

• retained

• drained

• lost in space

• in the bathroom sink

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Which soil would retain the most water?

• loam

• sand

• silt

• clay

Many plants cannot grow in sandy soil. Why is this true?

• Sandy soil does not hold enough water.

• Air cannot pass through sandy soil.

• Roots cannot easily push through sandy soil.

• Sandy soil has too many nutrients.

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This is found in the topsoil and is made of decaying plants and animals. 

• dirt

• water

• humus

• subsoil

What physical property of soil determines if it retains water?

• color

• particle size

• texture

• weight

If soil particles are large, then 

• more water is retained

• less water is retained

Fossil fuels are considered nonrenewable because...

• They are expensive.

• They cause pollution.

• They take a very long time to form.

• They can be replaced in our lifetime.

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A circuit has a switch, a battery, and a bulb. When the switch is closed, the light turns on. What type of energy moves through the wires of this closed circuit?

• sound

• chemical

• electrical

• physical

Brayson made the circuit shown here in his science class. What is the most likely reason that the bulb is not lit?

• The bulb is cracked.

• He did not use the right size battery.

• He used too many pieces of wire.

• He left the switch open.

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