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What are these?
Kidneys
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Dissolving salt in water is _________ change. ( reversible or irreversible )
reversible
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Why is electrical wiring usually made from copper? ( Because copper insulates electricity / Because copper conducts electricity )
Because copper conducts electricity.
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Which organ is responsible for sending blood all over the body?
the heart
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What is the name of this system?
Digestive system
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What is a circuit with several paths for electricity to flow? (open circuit / series circuit / parallel circuit )
parallel circuit
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If an object has more mass, it will ______. ( weigh more / weigh less )
weigh more
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The amount of matter in a object is ______ . ( pressure / force / mass )
mass
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What is the function of the liver? ( to breathe or to remove toxins from the blood )
Yay! ( to remove toxins from the blood )
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Mixing and dissolving are examples of reversible change. ( True / False )
True
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Choose the answers that respond to a chemical change. ( making a cake / Fireworks / Chopping onions )
Making a cake / Fireworks
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Matter can exist in different states : ______ , _______ or _______ .
solid, liquid , gas
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What is the name of this body system?
Nervous system
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Is an elastic band conductor or insulator?
insulator
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Evaporation happens when a liquid is _________ .
heated
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Choose the answers that respond to a physical change. ( Burning wood / melting ice / rotten bananas )
Melting ice
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Why is electrical wiring usually covered with a layer of plastic? ( To make it look pretty / To add more energy / To make it safe )
To make it safe
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Fireworks exploding in the sky undergo a physical change. ( True / False )
False
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When we heat up matter and change it from liquid to gas, this is called ________ .
evaporation
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Which of the following can work as an energy source? ( Wire / Light bulb / Battery )
Battery
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Set up _______________ areas to protect habitats.
conservation
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The resources come from the ___________ to make all the things we use on a daily basis.
Earth
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