| Question |
Answer |
| What organelle is found only in plants? |
Chloroplast |
| The cell theory consists of how many ideas? |
Three |
| What are the different levels of cell organization from cell to organism. |
Cells, tissues, organs, and organism. |
| Nerve cells are long and have many branches. This shape allows them to do what? |
send and to receive messages. |
| what provides support and protection for the plants cell? |
membrane |
| How are igneous rocks formed? |
when melted rock from inside the earth cools. |
| How are metamorphic rocks formed? |
New rocks that form when existing rock are heated or squeezed. |
| How are sedimentary rocks formed? |
broken pieces of rock, shells mineral grains and other materials squeeze together. |
| What are the characteristics of a mineral? |
they are luster, cleavage, crystals, streaks, color, double refraction, magnetism and reaction with acid.. |
| How many minerals have been discovered? |
more than 4000 |
| What does the word metamorphic mean? |
change |
| The size of minerals crystals in igneous rock depends on what? |
It depends on its temperature and how long it takes the rock to cool. |
| How are rocks classified? |
How they form |
| When the force on rock is great enough they break producing vibrations called what? |
earthquakes |
| Most earthquakes happen where? |
where 2 plate boundries meet. |
| What is the length of time for the earth rotate once on its axis and and to revolve around the sun once? |
24 hours for the Earth to rotate on its axis, and 365 days to revolve around the Sun. |
| What is the length of time for the moon to rotate around the earth and once on its axis |
27.3 days |
| What causes seasons? |
Earth tilled on its axis and its rotation around the sun. |
| What is one astronominal unit (AU)? |
An Astronomical Unit is approximately the mean distance between the Earth and the Sun |
| What is a light year? |
The distance that light travels in a vacuum in 1 year; 5.88 trillion miles or 9.46 trillion kilometers |
| The Sun is the center of what? |
Our solar system |
| What is the order that a solar eclipse is in? |
Sun...Moon...Earth |
| What is the order that a lunar eclipse is in? |
Sun...Earth...Moon |
Buen Viaje lv.2 ch 8
