2nd Reporting Period Review TM

The Earth revolves around the Sun in an elliptical orbit because of

• Magnetism

• Gravity

• Electromagnetism

• Luminosity

The object in our solar system with the strongest force of gravity pulling on all objects is the

• The Earth

• Jupiter

• The Asteroid Belt

• The Sun

Which statement is true about the motion of objects in our solar system?

• The gravitational force between two objects causes the less massive object to be flung in a straight line out into space.

• The gravitational force between two objects causes the less massive object to follow a curved path around the other more massive object

• The Luminosity of an object causes less massive objects to be flung in a straight line our into space.

• The Luminosity of between to objects causes the less massive object to follow a curved path around the other more massive object.

According to the HR Diagram the Sun is a medium sized star. Why does the Sun appear so much bigger and brighter than other more massive stars?

• The Moon reflects the light from the Sun making it appear brighter.

• The color yellow on the Electromagnetic Spectrum has the most energy making it appear brighter

• The Sun is closer than other stars making it appear brighter

• The electromagnetic wavelength from the Sun carries more energy than other stars.

What is true about a Nebula? (Possibly more than one correct answer)

• A nebula is mostly gas and dust

• A nebula is the birth place of stars

• A nebula is in the center of all galaxies

• A nebula is formed in what remains of a super nova.

• Stars with a Luminosity of 10⁶ are classified as Supergiants Stars

• Stars with a Luminosity of 10² are classified as White Dwarfs Stars

• Stars with a Luminosity of 10^-2 are classified as Main Sequence Stars

• Stars with a Luminosity of 10^-4 are classified as Giant Stars

According to the electromagnetic spectrum which of the following are true

• Radio waves have a wavelength of 10^-8

• Visible Light has a wavelength 10²

• Ultraviolet Light has a wavelength of 10^-8

• Microwaves have a wavelength of 10^-12

A physical change occurs when an object has a change to its shape, size, or has a change of state. When we eat food it is digested and nutrients are absorbed. Which of the following is an example of a physical change during the digestion process.

• The large intestines removes excess water

• The teeth tearing and mashing food in the mouth

• Bubbling in the stomach as acid reacts to food & drink

• The small intestines removes nutrients

When a substance is mixed with another substance small bubbles began to form. This is an example of

• Physical Change

• Chemical Change

Which statement is true about the number of elements in the chemical formula:  $C_2H_3O_2$  

• Carbon (C): 2; Hydrogen (H): 3; Oxygen (O): 2

• Carbon (C): 3; Hydrogen (H): 2; Oxygen (O): 2

• Carbon (C): 2; Hydrogen (H): 2; Oxygen (O): 3

• Carbon (C): 0; Hydrogen (H): 3; Oxygen (O): 1