Match the sentences in column a based on whether they describe radio waves, visible light waves, or both (column b). column a 1. they’re invisible. : they’re invisible. 2. they have colors. : they have colors. 3. they’re used to learn about dust and gas clouds. : they’re used to learn about dust and gas clouds. 4. they can travel in a vacuum. : they can travel in a vacuum. 5. they’re used to find the temperature of stars. : they’re used to find the temperature of stars. 6. they have energy. : they have energy.

1. They’re invisible - RADIO WAVES

2. They have colors. - VISIBLE LIGHT WAVES

3. They’re used to learn about dust and gas clouds. - BOTH

4. They can travel in a vacuum.  - BOTH

5. They’re used to find the temperature of stars. - VISIBLE LIGHT WAVES

 6. They have energy.  - BOTH

You need to be more specific.  i really don't know what a "motion map" is.you can draw a graph of an object's position, distance, displacement, speed,velocity, or acceleration versus time, or you can draw a graph of the object's x-position versus its y-position and not give any information about time at all.if the graph presents position or displacement against time,  then constant velocity is a straight line . . i.e. a line that has  constant slope.if the graph shows speed against time, then constant velocityis a horizontal piece of line.if the graph shows acceleration against time, then constant  velocity is a piece of line that lies on the x-axis . . it's value is zero.