Use the picture to determine if this is an observation or an inference.

The girl has a yellow shirt on.

Use the picture of the girl to determine if this is an observation or inference.

It must be warm outside because the girl is wearing a short sleeved shirt.

What is a control variable?

What is an independent variable?

What is a dependent variable?

Parker has been running for 6 months and is in great running shape. He wants to know if the time of day affects how fast he runs a half mile. Each day he runs 1/2 mile. He runs the first 1/2 mile in the morning at 7 am. He runs the second half mile at 1 pm. He runs the last half mile at 5 pm. All the days he ran it was 70 degrees and sunny at the time of the run.

What is the dependent variable? (result- what is being measured)

Parker has been running for 6 months and is in great running shape. He wants to know if the time of day affects how fast he runs a half mile. Each day he runs 1/2 mile. He runs the first 1/2 mile in the morning at 7 am. He runs the second half mile at 1 pm. He runs the last half mile at 5 pm. All the days he ran it was 70 degrees and sunny at the time of the run.

What is the independent variable? (purposely changed variable)

Parker has been running for 6 months and is in great running shape. He wants to know if the time of day affects how fast he runs a half mile. Each day he runs 1/2 mile. He runs the first 1/2 mile in the morning at 7 am. He runs the second half mile at 1 pm. He runs the last half mile at 5 pm. All the days he ran it was 70 degrees and sunny at the time of the run.

What is the control variable? (not changed)

I need to know what to use to weigh 4 pounds of beans?

I want to take the temperature of the room. What tool would I use?

I want to see how long my pencil is. What tool would I use?

I want to add 300 ml of water to my chemistry experiment. What tool would I use?