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8th Grade Science
Test Description: Review
Instructions: Answer all questions to get your test result.
1) 2H + 2O yield 2HO. Whats the product?
A
2HO
B
2H + 2O
C
2O
D
2H
2) What is the density of a 10 g object with a volume of 2 ml?
A
5 g/ml
B
12 g/ml
C
20 g/ml
D
8 g/ml
3) The most abundant element in the Earth's atmosphere is:
A
Oxygen
B
Hydrogen
C
Nitrogen
D
Carbon Dioxide
4) What is an example of a chemical change?
A
Rusting nail
B
Breaking glass
C
Cutting paper
D
Ice cube
5) What family/group on the perodic table is least reactive
A
Transition Metals
B
Alkali Metals
C
Alkaline Earth Metals
D
Noble Gases
6) What 2 factors influence gravitational attraction between objects
A
size and color
B
mass and distance
C
volume and distance
D
weight and mass
7) Where are metals found at on the periodic table?
A
right
B
left
C
stair case
D
botton
8) What state of matter moves the slowest
A
liquid
B
gas
C
solid
D
plasma
9) Which one is a compound?
A
Ca
B
H
C
HCl
D
He
10) What element shares similar chemical properties to that of Calcium?
A
Potassium
B
Barium
C
Carbon
D
Hydrogen
11) A student wants to make an electromagnet. Which items are need?
A
battery, heat, copper wire
B
magnet, copper wire, metal nail
C
copper wire, metal nail, battery
D
magnet, battery, heat
12) What state of matter has particles that have no definite shape or volume?
A
Liquid
B
Solid
C
Gas
D
Water
13) A strip of litmus paper turns blue when placed in a liquid. What is the liquid?
A
pure water
B
citrus juice
C
acid
D
base
14) Why does the moon's gravitational pull affect the Earth's tide more than the sun's gravitational pull affect the Earth's tides??
A
The moon is more dense
B
The moon orbits Earth, but the sun does not
C
The moon has phases
D
The moon is closer
15) What bird beak is best adapted to eat hard-shelled nuts?
A
Small and short
B
Curved and sharp
C
Long and skinny
D
Wide and thick
16) Which of these must occur when a substance goes through a chemical change?
A
The substance changes shape.
B
The substance forms a new substance
C
The substance gets larger.
D
The substance changes phases
17) John is making a pizza. Which process involves a chemical reaction?
A
baking the dough to form the crust
B
slicing pepperoni for topping
C
spreading cheese on the pizza
D
mixing spices for the sauce
18) What instrument and unit do you use for mass?
A
Spring scale and Newtons
B
Triple beam balance and kilograms
C
Triple beam balance and Newtons
D
Spring scale and kilograms
19) What basic units/smallets part of matter that has the same properties as an element called?
A
electrons
B
protons
C
atom
D
neutrons
20) What is an example of a mixture?
A
Table salt
B
Air
C
Oxygen
D
Water
*select an answer for all questions
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