Font size
Worksheets29.04.21 GR.3 SCIENCE ASSESSMENT
Total questions: 20
Worksheet time: 25mins
-------------------------------- forces are equal forces acting on one object in opposite directions. (balanced, unbalanced)
(a)
The children are playing tug of war. They both pull on the rope. The rope moves to the left. Are the forces acting on the rope balanced or unbalanced?
(a)
The boy is pulling on a heavy wagon. The wagon does not move. Are the forces acting on the wagon balanced or unbalanced?
(a)
This picture shows -------------------------------------
(a)
What could be an example of an unbalanced force?
A plate sitting on a dining table.
A ball at the top of the hill that is not moving.
A base ball that has been thrown.
A student pushes against a tree with a force of 10 NEWTONS (N). THE TREE DOES NOT MOVE (BALANCED FORCE). What is the amount of force exerted by the tree on the student?
0N
5N
10N
20N
Which ball would you expect to have the most speed when it hits the bottom of the ramp? Choose the correct answer.
First picture
second picture
third picture
The bottoms of trainers are designed to create friction with the ground. These are called
----------------------------------
a.friction
b.threads
c.treads
d.None of these
Polar bears have fur on the soles of their feet to -----------
(a)
We use the -------------------------- produced by friction when we strike a match.
(a)
Which of the following is NOT an example
of friction as a helpful force?
Using your hand to wave hello to a friend
Using a cloth to clean a pair of glasses
Using a marker to draw a picture on paper
Using a scrub brush to wash dishes
The picture shows a man climbing a mountain.
He is pulling on the rope to help him climb. The man chooses shoes to help him climb the mountain with good grip. Which one should he choose?
Why do snow boots have deep grooves in the soles?
to cool the feet down
to keep the feet warm
to make the boots lighter
to make the boots grip more
We can measure forces using a -------------------------------
(a)
A force meter measures forces in units called ----------------
(a)
The downward pull of gravity acts on all the objects of the earth. This downward pull of gravity is called------------
(a)
Who invented the Newton meter?
Sir Robert Hooke
Sir Isaac Newton
Zacharias Janssen
None of these
Look at the pictures. Read the scale on each newton meter.
6 N
10 N
5 N
8 N
4 N
7 N
None of these
Jack measures two more objects that have less force than the toy car (7 N). Choose the correct pair of objects.
toy train- 17 N , apple 2 N
scissors 1 N, apple 2 N
chair 8 N, scissors 1 N
None of these
If you are asked to test how far a paper spiral can stretch using paper clips, what factor will you change?
(a)
