X hits on this document





273 / 352

Indian Nations CouncilThe Greatest Show on Earth


How far can you throw a ball?

The answer depends on how strong you are and how you get the power in your arms transferred to the ball. It depends on the air. If the wind is blowing from behind the ball, it will go farther. If you throw the ball into the wind, then the wind will slow the ball down and it will fall quickly to the ground.

As you can see, the distance that you can throw depends on many factors.

Go outside and practice throwing a ball. See how the wind affects your throw. What happens if you spin the ball?

Some experiments with wind

Cut a stiff piece of paper into a rectangle. Fold down each side to make a bridge. Place paper bridge on a flat surface. Blow steadily under the bridge. What happens to the top of the bridge? What happens to the sides of the bridge?

Punch a hole in the bottom of two equal size cans. Thread string through each hole and knot it. Suspend the cans at the same height but only 1 inch apart. Blow gently between the cans. Which way do the cans move?

Hold a sheet of paper close to your mouth. Hold it so that the paper hangs down in a curve. Blow gently across the top of the paper. What happens to the paper?

Take a sheet of paper and fold it in half. Crease the fold firmly. Curve the top sheet and glue it in place. You have made a wing. Make a small hole in the top and bottom of your wing. Cut a short length from a straw to prop up your wing and stop it collapsing. Thread string through holes and the straw.Pull the string vertical. Now, while pulling the string, blow from the crease. What happens to the wing?


Nature Trail Pack Activity

This is a den competition - not a race - to test nature skills.  The trail should have 5 to 10 stations at which each den is asked to find something, identify something or otherwise have knowledge of nature lore.

Dens start at intervals of about five minutes. At each checkpoint, they find a message under a rock which tells them what they must do.  They have a scorecard on which they write their findings; then they go ton to the next station.  At each station, a mom or dad acts as judge to provide minimum help and to make sure the message is replaced under the rock.

The following is a sample nature trail that might be suitable for a small park.

STATION 1 -"Look for the biggest tree you can see from here. What direction is it? Write the direction on your scorecard.  Go northeast to a picnic table and look under it."

STATION 2 -"Within 15 paces of this spot, there are five different kinds of trees. Write the names of two of them.  Go south 50 paces and find a small mound of pebbles."

STATION 3 -"Within 20 feet of here, there is a clump of wildflowers. Write down its name. Go east until you come to a tree with a split trunk. Look around its base."

STATION 4 -"Somewhere in this tree there is a nest with young birds. Spot it but do not disturb the nest or birds. Watch for adult birds feeding the young or guess the name of the birds from the shape of the nest.  Write down what kind of birds you think they are. Go north toward the highway entrance to the park.

Bugs, Bark, Birds, and BoysPage X

Document info
Document views514
Page views514
Page last viewedMon Oct 24 10:32:16 UTC 2016