Getting to Know Plants — Science STD 6 — Question

Write the name of two objects that can float in water.

Which of the following food items does not provide any nutrient? Milk, Water, Orange juice, Tomato soup.

You cannot see objects through a piece of plywood. What would you call the plywood?

What is vermiculture?

Can you think of a situation where we can see the path of the light?

Activity.Let us look at the kind of movement allowed by a hinge. Make a cylinder with cardboard or thick chart paper, as shown in figure. Attach a small pencil to the cylinder by piercing the cylinder at the centre, as shown. Make a hollow half cylinder from cardboard such that the rolled up cylinder cati fit inside it easily. The hollow half cylinder with the rolled up cylinder sitting inside it, allows movement like a hinge. Try to move the rolled up cylinder. How does it move?

How is this movement different from what we saw with our constructed ball and socket joint?

State whether the following statements are true or false:
Silk fibre is obtained from the stem of a plant.

Activity.Roll a strip of paper into a cylinder. Make a small hole in an old rubber or plastic ball (under supervision) and push the paper cylinder into it as shown in figure. You can also stick the cylinder on the ball. Put the ball in a small bowl.

Does the all rotate freely inside the bowl? Does the paper cylinder also rotate?
 

Name two aquatic animals.