7.6a

How many different ELEMENTS are taking part in the chemical reaction shown?

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

A toy car was used in an investigation about unbalanced forces.  During which of the following scenarios was the car not experiencing an unbalanced force?

• The toy car speeds up as it rolls down a ramp.

• The toy car travels forward at a constant speed.

• The toy car slows down as it rolls up a hill.

• The toy car changes direction at a constant speed.

Tags

NGSS.MS-PS2-2

During which segment was animal standing still?

• Between 0 s and 2 s

• Between 2 s and 3 s

• Between 3 s and 4 s

• Between 4 s and 5 s

Tags

NGSS.MS-PS3-1

What is the average speed of the animal during the time represented in this graph?

• 0.2 m/s

• 0.5 m/s

• 5.0 m/s

• 25.0 m/s

Tags

NGSS.MS-PS3-1

When you chew a piece of food, your salivary glands release saliva to moisten the food allowing you to swallow the consumed food for the next step of digestion. Additionally, saliva has enzymes that begin to breakdown the starches within the food into smaller molecular components called glucose. What kind of change results from the breakdown of starch into glucose by saliva?

• mechanical

• physical

• chemical

• cyclical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which step in the digestive process represents a chemical change in food?

• storing of swallowed food in the stomach

• muscles that line the stomach mixing the consumed food and liquids

• moving the food down the esophagus and into the stomach

• enzymes within the small intestines breaking down the food into smaller molecules

Which of these is NOT an indicator of a CHEMICAL change?

• Bubbles are formed.

• A solid changes to a gas.

• The temperature changes.

• Two liquids create a solid.

Tags

NGSS.MS-PS1-2

What are the two types of Digestion?

• Chemical digestion & Mechanical digestion

• Mechanical digestion & Muscular Digestion

• Chemical digestion & Muscular digestion

• Dermal digestion & Muscular digestion

Enzymes and acids are examples of 

• mechanical digestion

• chemical digestion

Researchers are investigating processes that happen during digestion. Which answer choice describes only a physical change during digestion?

• Hydrochloric acid in the stomach breaks down proteins

• Chewing in the mouth breaks food into small pieces

• Enzymes in saliva start the digestion of starches before food is swallowed

• Bacteria in the intestines convert dietary fiber into fats