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2019 Grade 8 Intermediate-Level Science Test Questions 31-45
Test Description: Use your knowledge of Science to answer all questions. Good Luck.
Instructions: Answer all questions to get your test result.
1) One characteristic that salt water and sugar-water have in common is, at room temperature, they are
A
elements
B
mixtures
C
solids
D
gases
Helpful Hint
The diagram below represents parts of a power facility that are used to produce electricity.
2) What is the major source of energy for the production of electricity in this facility?
A
nuclear power
B
burning coal
C
prevailing winds
D
moving water
Helpful Hint
The illustration below represents balloon A, which has an electrical charge.
3) Balloon A would be most attracted to which balloon?
A
3
B
4
C
2
D
1
Helpful Hint
The diagram below represents a beaker of water being heated by a flame. The arrows represent heat transfer occurring in the beaker.
4) Which process is represented by the arrows in the diagram?
A
convection
B
condensation
C
radiation
D
conduction
Helpful Hint
The diagram below represents energy transformations in a moving electric toy car.
5) Which form of energy is the original source of power for this car?
A
sound
B
mechanical
C
electrical
D
light
Helpful Hint
The diagram below represents a bar magnet. Six locations, A through F, are labeled on the magnet.
6) Which two locations on the magnet would have the greatest attractive forces?
A
B and E
B
C and D
C
A and F
D
D and F
7) The Law of Conservation of Energy states that energy cannot be created or destroyed, but energy can change
A
its total volume
B
from one form to another
C
its total mass
D
from one state of matter to another
Helpful Hint
The diagram represents a person using a spring scale to pull a wooden block up a ramp.
8) The plastic straws were placed under the wooden block to
A
decrease the mass of the block
B
increase the gravitational attraction of the block
C
increase the surface area of the ramp
D
decrease the amount of friction
Helpful Hint
The diagram represents a person using a spring scale to pull a wooden block up a ramp.
9) The ramp would be classified as which type of simple machine?
A
a pulley
B
a lever
C
an inclined plane
D
a wheel and axle
Helpful Hint
The diagram below represents liquid water in a pan on a hot plate. The liquid water is boiling and changing into water vapor.
10) The process of boiling is considered to be a
A
physical change, because a new substance is not formed
B
physical change, because a new substance is formed
C
chemical change, because a new substance is not formed
D
chemical change, because a new substance is formed
Helpful Hint
The label shows some nutritional information for a box of macaroni and cheese.
11) The Calories on a food label indicate the amount of energy the food contains in one serving. Which form of energy is contained in food?
A
mechanical
B
light
C
electrical
D
chemical
Helpful Hint
The label shows some nutritional information for a box of macaroni and cheese.
12) Nutritious food choices have less than 30% of their Calories from fat per serving. The equation is given below. % Calories from Fat = (Calories from Fat/Calories) x 100. What is the % of Calories from fat in one serving of this macaroni and cheese?
A
14%
B
23%
C
36%
D
44%
Helpful Hint
The data table below shows the number of bacteria in two samples, A and B, growing in a laboratory over a fi ve-hour period. Data were collected every half hour.
13) If the pattern of growth continues, how many bacteria will be in sample B when six hours have elapsed?
A
64
B
1024
C
2048
D
32
Helpful Hint
The diagram below represents a graduated cylinder containing water before and after a rock suspended on a string is lowered into it.
14) What is the approximate volume of the rock suspended in the graduated cylinder?
A
100 mL
B
50 mL
C
300 mL
D
250 mL
Helpful Hint
The data table below shows information gathered from a science experiment. Time was measured in seconds (s) and distance was measured in meters (m).
15) Which grid is correctly designed to show these data in a line graph?
A
4
B
2
C
1
D
3
*select an answer for all questions
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