7.7a

5 Which of the following energy transformations occur when humans use energy from food to exercise?

• A Mechanical --> thermal --> chemical

• B Thermal --> electrical --> mechanical

• C Radiant --> mechanical --> thermal

• D Chemical --> mechanical --> thermal

Tags

NGSS.MS-PS3-5

6 What energy transformation takes place when a rabbit digests a carrot?

• F Radiant energy is transformed into chemical energy.

• G Chemical energy is transformed into heat and thermal energy.

• H Radiant energy is transformed into mechanical and heat energy.

• J Thermal energy is transformed into mechanical energy.

Metabolism refers to the living organisms' bodies chemical processes of breaking down nutrients into energy. What do biologists call this process in the human body?

• F Ingestion

• G Digestion

• H Elimination

• J Regurgitation

9 Animals are consumers, meaning they need to eat food for energy because they cannot make their own. Which energy transformation is taking place when an animal eats food so it can keep warm?

• A Mechanical to thermal

• B Mechanical to radiant

• C Chemical to thermal

• D Radiant to chemical

When a person eats too much food, they store the extra energy as fat. Which type of energy transformation is occurring in the body as energy from food is turned into fat?

• Mechanical to thermal

• Chemical to chemical

• Thermal to chemical

• Thermal to radiant

Tags

NGSS.MS-LS1-7

12 A student prepares for a five-mile run so she eats a nutritious meal three hours before the run. Which correctly illustrates the transformation of energy from eating the meal to the five mile run?

• F Chemical --> Thermal

• G Thermal --> Mechanical

• H Mechanical --> Thermal --> Chemical

• J Chemical --> Mechanical --> Thermal

13 Energy transformation is the process of changing energy from one form to another. Our digestive system converts food into energy.

Which of the transformations below below best illustrates the conversion of food into thermal energy?

• 
• 
• 
• 

Tags

NGSS.MS-LS1-7

Which of the following statements correctly distinguishes between speed and velocity?

• Speed includes direction, while velocity does not.

• Velocity includes direction, while speed does not.

• Both speed and velocity include direction.

• Neither speed nor velocity includes direction.

According to Newton's First Law of Motion, what will happen to an object at rest if no unbalanced force acts on it?

• It will start moving.

• It will remain at rest.

• It will accelerate.

• It will change direction.

Which of the following best describes Newton's First Law of Motion?

• An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force.

• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

• For every action, there is an equal and opposite reaction.

• The force of gravity acts between all masses.