3rd Grade Science : 3rd Grade Science
Study concepts, example questions & explanations for 3rd Grade Science
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Example Questions
Example Question #13 : Magnets To Solve Problems
Gluing magnets onto the sides of salt and pepper shakers, so they don't get separated is a solution to a common problem.
True
False
True
The statement in the question is true. A common problem is something that can often happen and in someone's everyday, ordinary life. Salt and pepper shakers are sold as a set but can easily get separated if someone sets one down and forgets about it rather than putting them back together. If they have magnets attached to the sides of them, they can be stuck together, so they never get separated.
Example Question #12 : Magnets To Solve Problems
Mindy needs to get iron filings out of a pile of sand, rice, and dirt in science class. The iron filings are tiny and fine so they blend in and disappear with the mixture. What would be the best tool to remove the filings from the sand?
Sifter
Microscope
Magnet
Tweezers
Magnet
Using scientific knowledge about magnets and their capabilities can help solve problems that we face in the real-world. If Mindy needs to remove the iron filings, she can use a magnet to remove them from the sand, dirt, and rice. The sand, dirt, and iron filings would slip through the sifter because they are so tiny, tweezers would not be able to sort the small filings out of the mixture, and a microscope would help Mindy see the iron filings better but would not help her separate them.
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