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- 1. Multiple Choice
Which of the following can be separated by a sifter?
water from salt
iron filings from sand
large pebbles from small pebbles
sugar from water
- 2. Multiple Choice
Which are compounds? Select all that apply.
rust
tarnish
glucose
carbon
hydrogen
- 3. Multiple Choice
Pots and pans are made from metals. Why is metal a good material with which to make a pot or a pan? Choose two.
metals are good thermal conductors
metals are good electrical conductors
metals have luster
metals have a high melting point
metals are usually heavy
- 4. Multiple Choice
Why do homes have insulation in the walls and ceilings? Choose two.
to keep cold air in during the winter
to keep cold air out during the summer
to keep warm air in during the summer
to keep warm air in during the winter
to keep warm air out during the summer
- 5. Multiple Choice
Which is NOT a common property of most metals?
most metals have a high melting point
most metals are very light and flexible
most metals are good thermal conductors
most metals are good electrical conductors
- 6. Multiple Choice
The Burmese python is invasive in Florida. Which is true about the python's effect on the ecosystem?
the python decreases the food supply for native species
the python provides food for plant life
the python does not disrupt the ecosystem
the python's population is regulated by predators.
- 7. Multiple Choice
Which are true about subatomic particles? Select all that apply.
protons have a positive charge
electrons can move between atoms
the atomic number tells how many protons the atom has
the neutron has a negative charge
protons and neutrons are found in the nucleus
- 8. Multiple Choice
Who is the scientist pictured here?
Bill Nye the Science Guy
Neil deGrasse Tyson
Neil Armstrong
Albert Einstein
- 9. Multiple Choice
What molecule is pictured here?
glucose
salt
sugar
rust
- 10. Multiple Choice
Water is H2O. If another atom of hydrogen is added, will it still be water?
yes, because water has some hydrogen and some oxygen
no, because it be a new substance - H2O2
yes, because it doesn't matter how many of each element there is, it is still water
no because then it will be salt
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