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