Worksheet:
A. What are different types of motion? Explain with examples.
B. Define joints. Explain its importance.
C. Explain how muscles work to cause body movement in bones?
D. Demonstrate that light moves in a straight line
E. Explain the construction of a pinhole camera.
F. An electric cell does not produce electricity when
a) Chemical inside get completely used
b) the terminals are not connected properly
c) both of the above
d) none of the above
Answers
Answer:
(d) none of the above
Explanation:
I think it helps you
Answer:
Explanation:
A. There are different types of motion: translational, rotational, periodic, and non periodic motion. A type of motion in which all parts of an object move the same distance in a given time is called translational motion. Examples are vehicles moving on a road, a child going down a bird flying in the sky.
B. A joint makes up two opposing surfaces that touch each other and allow movement of those two bones. ... Tendons attach the muscles to the bones and prevent damage to the muscle tissue directly from the joint movement. Ligaments connect tow bones together. They prevent a joint from having excessive movement.
C. Muscles move body parts by contracting and then relaxing. Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors. The flexor contracts to bend a limb at a joint.
D. Two experiments are used to demonstrate how light travels in straight lines. In the first example, the presenter arranges three pieces of card, with holes in, in an uneven line. The light stops and cannot travel through all three cards. When she arranges the holes in a straight line, the light can travel through.
E. A pinhole camera is a simple camera without a lens but with a tiny aperture, a pinhole camera – effectively a light-proof box with a small hole in one side. Light from a scene passes through the aperture and projects an inverted image on the opposite side of the box, which is known as the camera obscura effect.
F. No idea of F.
Sorry
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