Dimension Science 4 - Unit 2 PreTest

Desmond kicks a football toward a goal. Which two measurements does he need to know the speed of the ball?

• weight and time

• time and distance

• direction and weight

• distance and direction

Which picture shows a pattern of back-and-forth motion?

• 
• 
• 

Josh built a watering system for his plants. Water is not reaching plant 3. Where is the

watering system broken?

• 1

• 2

• 3

• 4

Some of the first car tires were very thin. Cars with these thin tires would slide off the road in rainstorms. New, bigger tires were made, as shown in the picture.

What are the likely reasons for the change in the tire design?

• People wanted safer tires.

• People wanted tires that could stay on wet roads.

• Car companies wanted nicer-looking tires on the cars.

Bob is studying static electricity. He held a

glass rod over pieces of paper. These pictures show what

happened with the rod and paper.

Choose correct statement that describe the force showed in each picture.

• A - Strong force, B - Weak force

• A - Weak force, B - Strong force

Kim is studying magnets. She wrote down some of what she learned. Complete her table.

Write the letters in the empty boxes in order from top to bottom and left to right to correctly complete the table. Some letters will not be used.

(The answer must be written in the right format, such as ABC)

Which sentence describes zero net force?

• a book sitting on a desk

• a leaf falling from a branch on a tree

• a girl putting on the brakes on her bike

• a truck speeding up to get on the highway

Jim wants to show his classmates balanced and unbalanced forces. He will use a small

seesaw and wooden blocks made of the same type of wood.

Write the correct letters in in order from top to bottom to show the steps Jim should follow. Not all of the

letters will be used.

(The answer must be written in the right format, such as ABC)

The diagram shows a crane picking up pieces of iron.

Which problem is being solved by the use of a magnet in this picture?

• how to build tall houses

• how to make iron magnetic

• how to move heavy pieces of iron

• how to hold a crane and iron pieces

  together

Gina is studying static electricity. Which question will help her the most?

• Which materials are attracted to magnets?

• How big should magnets be to attract each other?

• Do objects have to touch to transfer static electricity?

• Is static electricity the buildup of electricity in an object?