You are presented with the question "What causes ice sculptures to turn to liquid? " and the following answer choices: - UV rays - Snow - salt and water. - Heat energy - air cools - kinetic energy - Subzero temperatures - Water expanding Now knowing that melting means changing from a solid into a liquid by adding heat energy and ice Sculptures melt away, choose the best answer.
Heat energy
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You are presented with the question "What pulls objects towards large objects that orbit stars?" and the following answer choices: - planets - wind - sun's heat - dust - gravity - asteroids - speed - forces Now knowing that gravity pulls objects towards planets and by the simplest definition, a planet is a large object that orbits a star, choose the best answer.
gravity
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You are presented with the question "What is affected by the average number of individuals per unit of area or volume?" and the following answer choices: - goats - economy - cows - animals - vegetation - mammals - bushes - wind Now knowing that population density is the average number of individuals per unit of area or volume and economy is affected by population size and density, choose the best answer.
economy
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You are presented with the question "If you want to use a gasoline engine, what must you do with the gasoline?" and the following answer choices: - drain the gasoline - wash the gasoline - cool down the gasoline - move to different locations - adding heat - ignite the gasoline - vaporization - evaporation Now knowing that using a gasoline engine requires burning gasoline and when the fuel is ignited, it burns with oxygen, choose the best answer.
ignite the gasoline
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