Answer:
Magma that flows then cools on the earth's surface fast enough that there is no time for any crystals to form on the rocks and are as smooth as glass.
Explanation:
Explanation:
the last option is the correct answer
Answer:
Fine focus.
Explanation:
If you're referencing a microscope, then it would be fine focus. Coarse focus is a basic focus used to properly see a specimen, while fine focus enhance clarity and precision. To use both, you have to gently twist a knob until you can see the specimen at a desired clarity.
Here's a reference image if you need it, it's labeled all the parts of a microscope.
Answer:
They have a backbone, most use legs,wings,or fins for movement.