# Physics

Here is a list of all of the skills that cover physics! These skills are organized by grade, and you can move your mouse over any skill name to preview the skill. To start practicing, just click on any link. IXL will track your score, and the questions will automatically increase in difficulty as you improve!

## Second-grade skills

- A.1 Identify properties of an object
- A.2 Compare properties of objects
- A.3 Compare properties of materials
- A.4 Identify materials in objects
- A.5 Identify multiple materials in objects
- B.1 Classify matter as solid or liquid
- B.2 Identify solids and liquids
- B.3 Classify matter as solid, liquid, or gas
- B.4 Identify solids, liquids, and gases
- B.5 Sort solids, liquids, and gases
- C.1 Change-of-state diagrams: solid and liquid
- C.2 Change-of-state diagrams: liquid and gas
- C.3 Change-of-state diagrams: solid, liquid, and gas
- C.4 Heating, cooling, and changes of state: melting and freezing
- C.5 Heating, cooling, and changes of state: vaporizing and condensing
- D.1 Predict heat flow
- F.1 Identify mixtures
- G.1 Identify pushes and pulls
- G.2 How do mass and force affect motion?
- G.3 Compare the speeds of moving objects
- H.1 Identify magnets that attract or repel
- H.2 Label magnets that attract or repel

## Third-grade skills

- A.1 Identify properties of an object
- A.2 Compare properties of objects
- A.3 Compare properties of materials
- A.4 Identify materials in objects
- A.5 Identify multiple materials in objects
- B.1 Classify matter as solid, liquid, or gas
- B.2 Identify solids, liquids, and gases
- B.3 Sort solids, liquids, and gases
- C.1 Change-of-state diagrams: solid, liquid, and gas
- C.2 Heating, cooling, and changes of state
- D.1 Predict heat flow
- D.2 Predict temperature changes
- D.3 How is temperature related to thermal energy?
- F.1 Identify mixtures
- G.1 Identify pushes and pulls
- G.2 How do balanced and unbalanced forces affect motion?
- G.3 How do mass and force affect motion?
- G.4 Compare the speeds of moving objects
- H.1 Introduction to static electricity and charged objects
- I.1 Identify magnets that attract or repel
- I.2 Label magnets that attract or repel
- I.3 Compare strengths of magnetic forces
- V.1 Solve problems using magnets

## Fourth-grade skills

- A.1 Compare properties of objects
- A.2 Compare properties of materials
- B.1 Calculate density
- B.2 Understand conservation of matter using graphs
- C.1 Identify and sort solids, liquids, and gases
- C.2 Change-of-state diagrams: solid, liquid, and gas
- C.3 Heating, cooling, and changes of state
- D.1 Predict heat flow
- D.2 Predict temperature changes
- D.3 How is temperature related to thermal energy?
- F.1 Identify mixtures
- G.1 Identify directions of forces
- G.2 How do balanced and unbalanced forces affect motion?
- G.3 How does mass affect force and acceleration?
- H.1 Introduction to static electricity and charged objects
- I.1 Identify magnets that attract or repel
- I.2 Label magnets that attract or repel
- I.3 Compare strengths of magnetic forces

## Fifth-grade skills

- A.1 Compare properties of objects
- B.1 Calculate density
- B.2 Understand conservation of matter using graphs
- C.1 Change-of-state diagrams: melting, freezing, vaporizing, and condensing
- C.2 Change-of-state diagrams: melting, freezing, vaporizing, condensing, and sublimating
- C.3 Heating, cooling, and changes of state
- C.4 Predict heat flow
- C.5 Predict temperature changes
- C.6 How are temperature and mass related to thermal energy?
- E.1 Identify mixtures
- G.1 Identify directions of forces
- G.2 How do balanced and unbalanced forces affect motion?
- G.3 How does mass affect force and acceleration?
- H.1 Identify magnets that attract or repel
- H.2 Label magnets that attract or repel
- H.3 Compare magnitudes of magnetic forces

## Sixth-grade skills

- D.1 Calculate density
- D.2 Understand conservation of matter using graphs
- G.1 Calculate speed from time and distance
- G.2 Calculate distance from speed and time
- G.3 Calculate time from speed and distance
- G.4 Calculate speed, distance, and time I
- G.5 Calculate speed, distance, and time II
- G.6 Identify whether objects are accelerating
- G.7 How does mass affect force and acceleration?
- G.8 Predict forces using Newton's third law
- G.9 Balanced and unbalanced forces
- H.1 Identify changes in gravitational potential energy
- H.2 Use tables and graphs to identify patterns about kinetic energy
- H.3 Explore energy transformations: roller coaster ride
- H.4 Explore energy transformations: bike ride
- I.1 Predict heat flow and temperature changes
- I.2 How are temperature and mass related to thermal energy?
- I.3 Compare thermal energy transfers
- J.1 How does particle motion affect temperature?
- J.2 Particle motion and changes of state
- J.3 How does particle motion affect gas pressure?
- J.4 Identify how particle motion affects temperature and pressure
- K.1 Compare amplitudes, wavelengths, and frequencies of waves
- K.2 Compare energy of waves

## Seventh-grade skills

- D.1 Calculate density, mass, and volume
- G.1 Calculate velocity from time and distance
- G.2 Calculate distance from velocity and time
- G.3 Calculate time from velocity and distance
- G.4 Calculate velocity, distance, and time I
- G.5 Calculate velocity, distance, and time II
- G.6 Identify whether objects are accelerating
- G.7 How does mass affect force and acceleration?
- G.8 Predict forces using Newton's third law
- G.9 Balanced and unbalanced forces
- H.1 Identify changes in gravitational potential energy
- H.2 Use tables and graphs to identify patterns about kinetic energy
- H.3 Explore energy transformations: roller coaster ride
- H.4 Explore energy transformations: bike ride
- I.1 Predict heat flow and temperature changes
- I.2 Compare thermal energy transfers
- J.1 How does particle motion affect temperature?
- J.2 Particle motion and changes of state
- J.3 How does particle motion affect gas pressure?
- J.4 Identify how particle motion affects temperature and pressure
- K.1 Compare amplitudes, wavelengths, and frequencies of waves
- K.2 Compare energy of waves

## Eighth-grade skills

- D.1 Calculate density, mass, and volume
- G.1 Calculate velocity from time and distance
- G.2 Calculate distance from velocity and time
- G.3 Calculate time from velocity and distance
- G.4 Calculate velocity, distance, and time I
- G.5 Calculate velocity, distance, and time II
- G.6 Identify whether objects are accelerating
- G.7 How does mass affect force and acceleration?
- G.8 Predict forces using Newton's third law
- G.9 Balanced and unbalanced forces
- H.1 Identify changes in gravitational potential energy
- H.2 Use tables and graphs to identify patterns about kinetic energy
- H.3 Explore energy transformations: roller coaster ride
- H.4 Explore energy transformations: bike ride
- I.1 Predict heat flow and temperature changes
- I.2 Compare thermal energy transfers
- J.1 How does particle motion affect temperature?
- J.2 Particle motion and changes of state
- J.3 How does particle motion affect gas pressure?
- J.4 Identify how particle motion affects temperature and pressure
- K.1 Compare amplitudes, wavelengths, and frequencies of waves
- K.2 Compare energy of waves