*Question*
You are presented with the question "When metal is warmed, the transfer of heat does what to metal?" and the following answer choices: - expands - Energy. - breaks - blossoms - burning - voltage - improve - decreases Now knowing that when metal conducts heat , that metal expands and when a metal rod is warmed, the transfer of heat is by conduction, choose the best answer.
**Answer**
expands

*Question*
You are presented with the question "what does a flashlight require to produce light?" and the following answer choices: - condensation - energy - direct energy - batteries - sunlight - h2o - energy usage - heat energy Now knowing that aflashlight requires a source of electricity to produce light and batteries are a better source of DC electricity, choose the best answer.
**Answer**
batteries

*Question*
You are presented with the question "Phototropism means growing toward what?" and the following answer choices: - rocks - energy - retina - light - heat - The Sun - plants - sand Now knowing that plants exhibit phototropism, or growing toward a light source and green plants use light as their primary energy source, choose the best answer.
**Answer**
light

*Question*
You are presented with the question "What is formed when a high mass celestial body collapses?" and the following answer choices: - rays or beams - Calcium carbonate - It gets heated up - fossil fuels - scattered light - layers of fat - a black hole - heating liquids Now knowing that ablack hole is formed by a high-mass star collapses and stars are on an outermost celestial sphere, choose the best answer.
**Answer**
a black hole