4th Grade SCIENCE Simulation

Look at the photo of the tree. Which statement about the tree is an observation?

• The tree will grow its leaves back in the spring.

• The tree has no leaves.

• The tree is dead.

• The tree lost its leaves due to the heat and lack of rain.

Which piece of information about the high school basketball team is QUALITATIVE?

• 15 players on the team

• average age of the players is 17

• good at passing the ball

• the tallest player is 6’1”

A student is measuring how long it takes an ice cube to melt on the sidewalk. What tool should the student use to measure elapsed time in this demonstration?

• meter stick

• centimeter ruler

• thermometer

• stopwatch

Examine the scale on the thermometer. What degree intervals are used on it?

• one degree

• two degrees

• five degrees

• ten degrees

A student is testing the effects of fertilizer on plant growth. What is one way that conditions need to be controlled for the experiment to be valid?

• All plants should be in the same type of soil.

• All plants should be in different sized containers.

• All plants should be at different temperatures.

• There should be other plants in the room.

Mrs. Tanner’s class wanted to find out how many school activities students were involved in, depending on their age. The chart shows the data that they found. Which age group of students are the most involved in school activities?

• 7-9

• 10-12

• 13-15

• 16-18

For a class experiment, an electro-magnet has been constructed by wrapping coils of wire around a nail and connecting the ends of the wire to a battery. Students will investigate the effects of the number of wire turns on the strength of the magnet, as measured by how many paper clips the nail will pick up.

What variable will we change to conduct this investigation?

• the voltage of the current

• number of wire turns of the coil

• the direction of the current flow

• the size of the nail

For a class experiment, an electro-magnet has been constructed by wrapping coils of wire around a nail and connecting the ends of the wire to a battery. Students will investigate the effects of the number of wire turns on the strength of the magnet, as measured by how many paper clips the nail will pick up.

What is a possible hypothesis for this investigation?

• The longer the current runs, the more paper clips will be attracted.

• The more turns of wire on the coil, the less current will flow.

• Increasing the number of turns of wire in the coil increases the strength of the magnet.

• The larger the nail, the more paper clips it can pick up.

A ball is moving through the air. How can its motion be described?

• by describing its direction

• by describing its direction and speed

• by describing its speed and spin

• by describing its spin

What can cause a moving object to change its motion?

• a force

• its inertia

• its speed

• a vector