Select the correct answer. Emma is doing a laboratory experiment to separate components of crude oil. She decides to use a technique that will separate the components
based on their boiling points. Which technique uses this principle?
filtration
O B. distillation
O C. centrifugation
O D. chromatography
titration
• A.
• E.

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change. the substance changes to a new substance. the original substance can be recovered. the color changes. gas is produced and given off. the substance changes size, shape, or volume.

The image shows the process of which is used in nuclear power plants. photo attached

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.