Chapter1

A centimeter is equivalent to:

0.01 m.

One kilogram is the same as

1000g.

The size of a picture is given as 84cm by 255cm. Since (84)(255)= 2.142 exactly, the area of the picture is correctly expressed as

2.142cm^2

The time needed for a planet to orbit the sun:

Depends on the average distance of the planet from the sun.

One kilometer is larger than one mile.

False

The earth is the perfect sphere.

False

The standard unit for length is a foot.

False.

A scientific idea usually starts out as a:

Hypothesis

The speed of a planet and its orbit

Is the highest when it is closest to the sun.

The discovery that the planets orbit in an ellipse rather than the circle was made by:

Kepler

The metric prefix that means one thousand (1000) is

Kilo-

The length of the year is

More than 365 days

Scientific theories:

Must be constantly reviewed to see whether they agree with new experimental observations.

The scientist who showed that gravity accounts for Kepler's laws of planetary motion was

Newton

The object in the sky that lies very nearly on the earths axis is:

Polaris.

A year is the time needed for:

The earth to drift completely around the sun.

A day is the time needed for:

The earth to turn completely on its axis.

The standard unit for time it's a second.

True.

In most parts of the world high tides occur approximately

Twice a day