There are 8 elements that together make up 98.5% of earth crust oxygen 46.6% aluminum 8.1% iron 5.0% calcium 3.6% sodium 2.8% potassium 2.6% magnesium 2.1% and silicon what percentage of earth crust is silicon

In the northern hemisphere, are the day lengths greater of less than 12 hours between the winter solstice and the spring equinox?

how is the color of an object related to the wavelengths of light that are reflected and the wavelengths that are absorbed

Which statement about the properties of matter is true? * 25* A. It is possible for matter to have different physical properties but the same chemical properties. B. It is possible for matter to have only chemical properties. C.

The kinetic energy of a ball with a mass of 0.5 kg and a velocity of 10 m/s is J. (Formula:)

How many tips does a snowflake have?

Rachel is making cookies. She pours 1/2 cup of oil into a bowl, followed by 1 cup of water. The oil rises to the surface of the bowl. Why?

Two particles collide, one of which was initially moving and the other initially at rest. Is it possible for both particles to be at rest after the collision?

What is the first thing to check when a refrigerator stops working?

You push down on the car to provide more friction for the tires allowing the cars tires to propel it forward 5 meters. How much work do you do?

Minerals that form from magma process will tend to form?