Journey to Space MCQ Test 2 Answer Guide – Science Homework Answer Guides

1.
1 pt(s).

A boy pulls a box across a a table. The friction will be biggest if the table

is rough

is smooth

has beads on it

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
	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

be harder to stop

be easier to clean

use more petrol every mile

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
	D.	weight


5. 1 pt(s).	People in Australia do not fall off the Earth because
	A.	the air pulls them down
	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
	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

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?

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

the same as on Y

bigger than on Y

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

the same as before

bigger than before

less than before

11.
1 pt(s).

After it has rained, the friction between car tyre and the road

increases and it is more likely to skid

decreases and it is more likely to skid

increases and it is less likely to skid

decreases and it is less likely to skid


12. 1 pt(s).	When energy is lost to friction, what is always made?
	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.
	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
	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
	D.	A weightlifter chalking his hands
	E.	A skier waxing her skis

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