Science Quiz Bee Grade 7

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  A student fully dissolved 10 g of sugar were added to 100 ml of water at 25C. This is an example of________solution.

• unsaturated

• saturated

• supersaturated

• diluted solution

When iron fillings are mixed with sand, the iron can be removed using a magnet.  This is evidence that the change that occurred when the two were mixed was ________

• physical

• chemical

• irreversible

• molecular

The elements argon, krypton, and xenon are all non-metals. What property would these elements have in common?

• Good conductor of thermal energy

• poor conductor of electricity

• shiny, lustrous surface

• soft and malleable

Which of the following is considered as a biotic component of an ecosystem?

• flood

• sunlight

• temperature

• wildlife

In the sentence “Human body systems have a complementary relationship,” what does the word complementary mean?

• supporting each other

• competing against each other

• unrelated to each other

• replacing each other

What is the difference between unicellular and multicellular?

• they are the same

• one has a nucleus and one doesn't

• unicellular has one cell and multicellular has many

• one is bacteria and the other is archaebacteria

Which color absorbs all light?

• white

• black

• orange

• green

Which of the following letters will be seen without any change in a plane mirror?

• S

• T

• L

• P

Why translucent materials can form a shadow but it's not as dark as opaque materials?

• Because they let most light to pass through it

• because they let some light and block some light to pass through it

• because they block all of the light to pass through it

• because no light is block

Which of the following is a reflector of light?

• the sun

• the moon

• the star

• fire