What material is used to make most electrical wires?
(Copper, because it conducts electricity well.)
What material is best for making a window?
(Glass, because it is transparent and strong.)
Why do we use bricks for building houses?
(Because they are strong, durable, and weather-resistant.)
How can you test if a material is magnetic?
(Use a magnet to see if it sticks.)
What is the best way to test if a material is waterproof?
(Pour water on it and check if it absorbs or repels water.)
Name a tool we use to measure temperature.
(Thermometer.)
What is absorbent material?
(A material that soaks up liquid, like a sponge or towel.)
What is a fair test in science?
(A test where only one variable is changed, and all other conditions are kept the same.)
Why do we only change one variable in a fair test?
(So we can see exactly what caused the results.)
What do we call the thing we change in a fair test?
(The independent variable.)
What do we call the thing we measure in a fair test?
(The dependent variable.)
What do we call the things that stay the same in a fair test?
(Controlled variables.)
If we are testing which brand of paper towel absorbs the most water, what is the independent variable?
(The brand of paper towel.)
Why should we repeat an experiment more than once?
(To make sure the results are reliable and not a mistake.)
True or False: Changing multiple things at once in an experiment makes it more accurate.
(False—changing multiple things makes the test unfair.)
If we are testing which material keeps a drink warm the longest, name one material we could test.
(Examples: Plastic, metal, glass, ceramic, etc.)
