Science practice exam

1)) We can change materials from solid to a liquid by ……………….

• A)cooling.          

•   B) heating            

• C) breaking

2) Which of the following is reversible? (Changes back to the original state).

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3) Which of the following is irreversible? (Cannot change back to original state).

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4) Which of the following circuits makes the bulb light up?

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Choose the correct answer.

• A)Days and nights  

• B)12 months

Choose correct answer.

• A)Days and nights  

• B)12 months

Write True (T) or False (F).

Salt, sugar, and coffee dissolve faster in cold.

• False

• True

Write True (T) or False (F).

The Sun is the brightest source of.

• False

• True

When …………………… is heated, it turns back to water again.

• A) Ice

• B) steel

The aluminum and …………………… need a lot of heat to change into a liquid.

• A) steel

• B)ice