Journey to Space MCQ Test 2 Answer Guide

1.
1 pt(s).
A boy pulls a box across a a table. The friction will be biggest if the table

correct answer choice answer choice you marked A. is rough
B. is smooth
C. has beads on it
D. has oil on it
2.
1 pt(s).
If the force from air friction on a rocket is made less, the highest speed it can go will
A. be zero
B. become lower
C. stay the same
correct answer choice answer choice you marked D. become higher
3.
1 pt(s).
A car mechanic changed the brakes on a car, so that there was no friction between the brakes and the wheels. The car will

correct answer choice answer choice you marked A. be harder to stop
B. be easier to clean
C. use more petrol every mile
D. be easier to stop
4.
1 pt(s).
The force of gravity pulling on an object is called its
A. shape
B. mass
C. volume
correct answer choice answer choice you marked D. weight
5.
1 pt(s).
People in Australia do not fall off the Earth because
A. the air pulls them down
correct answer choice answer choice you marked B. the Earth pulls them down
C. the Earth is spinning around
D. Australia is a large island
6.
1 pt(s).
The newton is a unit of
A. charge
B. volume
correct answer choice answer choice you marked C. weight
D. frequency
7.
1 pt(s).
Examine the diagrams of test tubes below. There is a bead in each tube. The tubes were turned over at the same time. In which test tube will friction be greatest

correct answer choice answer choice you marked A. A
B. B
C. C
D. D
8.
1 pt(s).
Examine the diagrams of test tubes. There is a bead in each tube. The tubes were turned over at the same time. In which test tube will the bead reach the bottom first?

A. A
B. B
C. C
correct answer choice answer choice you marked D. D
9.
1 pt(s).
In the experiment shown in the diagram, the boxes are given the same push. they slide across the table. Box X stops first. The friction on X is

A. the same as on Y
correct answer choice answer choice you marked B. bigger than on Y
C. less than on Y
10.
1 pt(s).
The hinges on a door are oiled. When the door is moved, the friction in the hinges is

A. the same as before
B. bigger than before
correct answer choice answer choice you marked C. less than before
11.
1 pt(s).
After it has rained, the friction between car tyre and the road

A. increases and it is more likely to skid
correct answer choice answer choice you marked B. decreases and it is more likely to skid
C. increases and it is less likely to skid
D. decreases and it is less likely to skid
12.
1 pt(s).
When energy is lost to friction, what is always made?
correct answer choice answer choice you marked A. heat
B. a smell
C. a noise
D. light
13.
1 pt(s).
Which of the following will improve the streamlining of a car?
A. Increasing the size of the engine in the car.
correct answer choice answer choice you marked B. Making the outside of the car a smooth shape.
C. Increasing the weight of the car.
D. Decreasing the weight of the car.
E. Driving the car at high speeds.
14.
1 pt(s).
Two surfaces are in contact. Which of the following materials would reduce the friction between the surfaces?
A. Sandpaper
B. Rubber
C. Concrete
correct answer choice answer choice you marked D. Oil
E. Wood
15.
1 pt(s).
Sportsmen and sportswomen use a variety of methods to increase or decrease the force of friction. Which of the following statements describes a method used to increase the force of friction?
A. A cyclist oiling the chain of her bicycle
B. An athlete wearing smooth, tight-fitting clothing
C. A swimmer wearing a swimming cap
correct answer choice answer choice you marked D. A weightlifter chalking his hands
E. A skier waxing her skis

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