Which is an example of Earth's conditions slowly changing?

a.

meteors striking

c.

continents moving

b.

volcanoes erupting

d.

a mass extinction

Using a cathode ray tube, Thomson confirmed that atoms must have an overall positive charge. atoms are made of particles that have a negative charge. electrons in atoms must have varying amounts of energy. electrons are only found in the nucleus.

If you shine a laser toward a friend in a spaceship who is moving away from you at half the speed of light, what does your friend see

The velocity of a sound on a particular day outside is 331 meters/second. what is the frequency of a tone if it has a wavelength of 0.6 meters?

A biker traveling at 35mi/hr hits a hay bale and is stopped in. 5s what is the bikers acceleration?

Not all energy sources derive their energy from the sun. Choose the three from the list below that derive their energy from sources other than the sun. chemical heat light geothermal nuclear tidal

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

What is 18 degrees celsius in fahrenheit?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Nitrogen and Hydrogen react to form ammonia (NH3). The reaction looks like this: Ammonia What is the ratio of nitrogen atoms to hydrogen atoms in ammonia? 1 to 2 1 to 3 2 to 1 3 to 1

Place the following types of electromagnetic radiation in order of increasing wavelength. ultraviolet light gamma rays radio waves Place the following types of electromagnetic radiation in order of increasing wavelength.