Sci Rev

Question 1

When valence electrons are in their lowest possible energy they are in their ____

Answer 1

Ground state

Question 2

What can cause valence electrons to become excited

Answer 2

Heat

Question 3

What do valence electrons do when excited by heat?

Answer 3

They jump up an energy level into an excited state

Question 4

When valence electrons move they either _____ or ____ light

Answer 4

Absorb or emit

Question 5

What do valence electrons returning to a lower level do?

Answer 5

Emit light

Question 6

Shells increase in energy from ____?

Answer 6

The innermost shell outwards

Question 7

What is the equation for photosynthesis?

Answer 7

6H2O + 6CO2 –> C6H12O6 + 6O2

Question 8

Where does photosynthesis occur?

Answer 8

Chloroplasts

Question 9

Respiration releases the chemical energy in _____ for use in ______

Answer 9

Glucose for use in life processes

Question 10

What’s the equation for how many electrons can fit in each shell?

Answer 10

2 x shell number (squared) , e.g., 2 x 4 (squared) =

Question 11

If an atom loses an electron it becomes what?

Answer 11

Positively charged, a cation

Question 12

If an atom gains an electron it becomes what?

Answer 12

Negatively charged, an ion

Question 13

Ionic bonds form between what?

Answer 13

A metal and a non-metal

Question 14

Neutrons will have one more digit than protons if it is an uneven number, T or F?

Answer 14

True

Question 15

What is an unbalanced force called?

Answer 15

A net force

Question 16

What are the 4 forces of flight?

Answer 16

Lift, drag, weight and thrust

Question 17

What is Newton’s first law?

Answer 17

Law of Inertia

Question 18

What is the Law of Inertia?

Answer 18

If in object is at rest it will stay at rest and if an object is moving it will keep moving at constant speed unless an external force acts on the object, e.g., when you kick a ball uphill and it stops due to gravity.

Question 19

What is Newton’s second law?

Answer 19

Law of Acceleration

Question 20

What is the Law of Acceleration?

Answer 20

When an external force is applied to an object, it causes it to accelerate, e.g., force = mass x acceleration

Question 21

What is Newton’s third law?

Answer 21

Law of Motion

Question 22

What is the Law of Motion?

Answer 22

Every time there is an action force, there is also a reaction force that is equal in size and acts in the opposite direction, e.g., when you sit on a chair it is applying an equal amount of force back, otherwise you would fall through or you would bounce off the chair.

Question 23

What are the forces?

Answer 23

Push, pull, or twist applied from one object to another

Question 24

What is drag?

Answer 24

Friction with the air that slows the plane down