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eighth grade science review

Total questions: 20

Worksheet time: 12mins

Name
Class
Date
1.

It is cold outside and raining, your mother asks you if it is high pressure or low pressure. What do you say?

a)

High pressure.

b)

Low pressure.

c)

No answer.

2.

what is the biggest group on the periodic table of elements?

a)

metals

b)

nonmetals

c)

metaloids

d)

halogens

3.
Some objects like the Sun produce their own light.  Others don't.  Why can we see objects that don't produce light?
a)
They absorb the light.
b)
They reflect the light.
c)
They transmit the light.
d)
They bounce the light around until it strikes our eyes.
4.

which state of matter has a fixed volume and shape?

a)

gas

b)

liquid

c)

all three

d)

solid

5.
About how long does it take the Moon to make one complete cycle around the earth?
a)
24 hours
b)
7 days
c)
365 days
d)
28 days
6.
A community of living and nonliving things in their natural environment makes up a(n)_______________
a)
food web
b)
ecosystem
c)
food chain
d)
carbon cycle
7.

If an object has particles that are moving very quickly, the object's temperature is probably _____.

a)

hot

b)

slow

c)

big

d)

cold

8.
Heat from the sun travels to Earth by _____.
a)
conduction
b)
convection
c)
insulation
d)
radiation
9.
Which is a conductor?
a)
wool sweater
b)
aluminum foil
c)
oven mitt
d)
wooden spoon
10.

Which property of matter is determined by dividing its mass by its volume?

a)

friction

b)

buoyancy

c)

density

d)

mass

11.

The following liquids are poured together in a beaker: alcohol (density=0.79), corn syrup (density=1.38), and water (density=1.0). Which of these liquids will sink to the bottom of the beaker?

a)

alcohol

b)

corn syrup

c)

water

12.
what type of cloud is shown?
a)
cumulus
b)
cirrus
c)
stratus
13.
This weather instrument is a...
a)
anemometer
b)
barometer
c)
wind vane
d)
thermometer
14.
The blue atoms are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
15.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
16.
How could I reduce the effort force needed to lift the load?
a)
move the fulcrum away from the load
b)
move the fulcrum closer to the load
c)
place the fulcrum in the middle
17.
How can the lever be balanced?
a)
add weight to the right side
b)
move the fulcrum right
c)
move the heavier weight back
18.

What statement accurately reflects the relationship between speed and velocity?

a)

Speed and velocity are the same

b)

Speed and velocity are not related

c)

Velocity is speed plus direction

d)

Speed is velocity plus direction

19.
The number of waves that pass a certain point in one second is the wave’s ____.
a)
frequency
b)
amplitude
c)
wavelength
d)
intensity
20.

A student walks for 2.0 hours and travels 5.0 km. What is the average speed of the student?

a)

2.0 km/hr

b)

2.5 km/hr

c)

10 km/hr

d)

0.4 km/hr

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