Which planet has no atmosphere, which prevents erosion?

A. Neptune

B. Uranus

C. Mars

D. Mercury

Newton discovered that gravity affects the orbits of planets True Or False

What instrument is used to measure current? 1. a current machine 2. an ammeter 3. a currentometer 4. a voltmeter

The approximate length of an unsharpened number 2 pencil is

You pull your sled through the snow a distance of 500 meters with a horizontal force of 200 newtons. How much work did you do?

Which one of the following temperatures is equal to 5°C?

What kind of change is salt dissolving in water

Which of these is the most effective way for manny to cool down after kickboxing? start static stretches to increase his flexibility walk around to lower his heart rate sit and catch his breath to avoid light-headedness run one to three miles to

One of the driving forces of plate motion is: A. volcanic eruptions along coastlines B. meteor impacts in the ocean basins C. convection currents in the mantle D. hot liquid magma in the inner core

Which element is required for the combustion of fossil fuels? nitrogen hydrogen oxygen carbon

When air pressure is lower what happens to a balloon filled with air