I have some science questions. Test notes to be exact...?

Question

1. What are plate boundaries? Some examples?
2. Why are the older Hawaiian Islands west of the newer ones?
3. What is runny lava mostly made of?
4. What does the amount of silica and water in magma do to a volcano?
5. If a volcano that was covered with snow and ice were to erupt
explosively, what would the effect be on the surrounding area?
6. What are three things scientists check when predicting volcanoes?

7. Doesn't the question "Where do volcanoes form?" and "Volcanoes form where?" mean the same thing???

If you answer all of these questions correctly, I'll give you the ten points.

Answer 1

1. Plate boundaries are the edges of tectonic plates. One boundary is between the North American plate and the Caribbean.

2. The older Hawaiian islands are to the west of the new ones because the Pacific plate is traveling above the volcanic group producing the islands.

3. Various igneous rock.

4. Don't know.

5. Flooding, mudslides, avalanches.

6. Seismic activity, magma pressure, gaseous effluent.

7. Looks good to me.

Answer 2

1. Tectonic plate boundaries are where two continental, two oceanic, or an oceanic and continental plate meet. Two examples: the San Andreas fault is the boundary between the Pacific and the American plates, and the Himalayan Mountains are caused by the collision between the Indian and the Asian plates.

2. The Pacific plate is moving westward across a hot spot in the mantle.

3. Runny lava is made mostly of dark-colored silicate minerals and siliceous liquid. The minerals typically are of the pyroxene or amphibole families. Once the lava cools it forms basalt, with pyroxenes and amphibole minerals, some of the micas, and so on, but no free silica.

4. Silica-rich lavas are much more viscous, and more likely to be explosive compared to silica poor lavas. Volcanoes from them are more likely to be tall (until they explode) than of the shield or fissure variety. Water in a magma makes it less viscous, so volcanoes would tend to be of the shield type, with lots of steam emanations.

5. Aside from the lava and ash, extensive mudslides and debris flows would occur, and avalanches would be likely.

6. Seismic activity, gas eruptions, doming (upraising) of the ground.

7. Yes

Answer 3

1. where two plates meet with either a convergent, divergent of tramform boundry. ex: the pacific plate and the north american plate meet along the san andres fault in california- this a transform plate boundry. meaing the pacific plate is moving one direction and the n. american plate in moving the opposite.

2. beacuse the pacific plate is moving in a north easterly direction

3.very hot ignious rock- much like water flow but when is cooled becomes ice. it's made up of the same matter only at different temperatures

4. not quite sure. might have something to do with the type of eruption it will have- how much presure it will create

5. mt. st. helens- May 18, 1980. flash flooding, mud slides.

6. sismic activities, abnormal animal behavior, water toxicalogy

7. no but them maybe yes. does saying "where to babies come from" mean the same thing as "where do babies form"
these questions could be taken either way- the same or completely different. "where do volcanos form" could mean where on the planet are they more likely to form. and "volcanos form where?" could be dealing completely with platetectonics. I guess it's just up to the way you would interpret them.