Physics Ch.1

Science is a body of knowledge that

• describes order in nature.

• is an ongoing human activity

• condenses knowledge into testable laws

• all of the above

To a fair approximation, Early Greeks knew the

• Size of the earth

• size of the moon

• Earth-moon distance

• All of the above

When the Sun shines on the Moon, the Moon casts a shadow

• at all times

• that is tapered

• that sometimes falls on Earth

• all of the above

Eratosthenes' measurements of Earth's size involved

• a deep well in Syene

• a pillar's shadow in Alexandria.

• surveying the distance between Alexandria and Syene

• all of the above

When we see a half Moon in the sky, the lines between Earth, Moon, and Sun

• are equal in length

• are parallel to one another

• Form a right triangle

• all of the above

Spots of sunlight on the ground cast through openings between leaves in trees above are actually

• images of the sun

• Part of a solar eclipse

• Due to refraction of sunlight

• all of the above

The safest way to view an image of the Sun is to use

• a telescope

• binoculars

• a pinhole

• colored sunglasses

The scientific method is most effective in

• making hypotheses

• gaining, organizing, and applying new knowledge

• discovering new things

• making theories

An educated scientific guess is a

• hypothesis

• theory

• both of these

• neither of these

Facts in the field of science

• are absolute

• are changeable

• mean very little

• more important than theories