SCIENCE 19. A teacher wants to model for young children that matter is not destroyed when it changes. Which of the following models would best
show this to the children? *
a. boiling an ice cube so that it changes into gas
b. burning a piece of paper so that it will change into ash and smoke
c. taking a cup of water, pouring it onto sand, and watching the sand absorb it
d. weighing a piece of clay and then changing the shape of it and weighing it
againOption 1

asthenosphere and convection

which three statements are true about all alloys?

the design of a ski jumping suit involves a trade-off between giving the skiers lift to get higher jumps and ensuring the skier does not face a lot of drag before the jump itself. an expansive suit may to lift the skier higher, but at the same time, it will also increase the air resistance. higher air resistance as the skier goes down the slope limits the speed of the jump. a big suit also increases the risk of losing balance or control, especially if there's a strong gust of wind. while technologically enhanced suits a lot, clothing is not the only factor in a ski jumper’s success. gathering speed while skiing down the slope, ensuring good speed on the ramp, and maintaining good body posture and form in the air all contribute to a ski jumper's success.