1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Triss [41]
2 years ago
12

15. A geologist discovers a sample of fine-grained rock made up of very small crystals. Based on its physical appearance, what c

an the geologist conclude about the rock?
Biology
2 answers:
Kipish [7]2 years ago
7 0

Answer:

It formed from rock that cooled quickly

Explanation:

B.

kiruha [24]2 years ago
6 0

Answer:

It is an extrusive igneous rock

Explanation:

Based on the physical appearance, the geologist can make an accurate conclusion about the rock's formation and in which type of rocks does it belong. The fine-grains made up of small crystals give away clues about the formation of the rock. Fine grains with small structures occur when the lava reaches the surface and cools off very quickly, thus not giving the crystals enough time to grow, so they are very small. The geologist can classify this rock on base of this information as an igneous rock, as it has been formed from lava, and as an extrusive igneous rock, as the fine grains and small crystals only occur when the lava cools of quickly on the surface.

You might be interested in
Propose a hypothesis of why the flu vaccine must be given every year but for most viral infections one or two doses of the vacci
ahrayia [7]
The flu vaccine changes every year. The flu vaccine is based on a predicted strain that is anticipated to be the most infectious that year. Thats why people who sometimes get the vaccination still get the flu, they don't have the antibodies for the strain they were infected with.  Strains for viral disease don't change very much and usually the vaccination for them cover them well. 
6 0
3 years ago
Read 2 more answers
Give a fact about red blood cells
Novosadov [1.4K]

Answer:

Red blood cells (erythrocytes)

Red blood cells carry oxygen from your lungs to your tissues. They also bring carbon dioxide back to your lungs. Red blood cells make up almost half of your blood. The lifespan of a red blood cell is around 120 days

Explanation:

7 0
3 years ago
Which of these is a method of obtaining oil? A. Tar sands extraction B. Coal mining C. Surface mining D. Underground mining
hodyreva [135]

Tar Sands Extraction!! (APEX)

8 0
3 years ago
Which of the following is an example of an organ?
nataly862011 [7]
The stomach is an example of an organ. The mitochondria N is an example of an organelle. The mushroom and the bacterium are examples of organisms.
6 0
2 years ago
16. The method of movement that requires the expenditure of ATP molecules is
stira [4]

Answer:

It is active transport

Explanation:

because the ions are moving against the concentration gradient

3 0
3 years ago
Other questions:
  • Describe the competitive exclusion principle, and explain how competitive exclusion may affect community structure.
    11·1 answer
  • Explain how a virus attacks a cell.
    9·1 answer
  • Which causes the biodiversity of rainforests?
    6·2 answers
  • Select the most appropriate tool for each
    6·2 answers
  • Fertilization is a process that occurs during sexual reproduction.
    9·2 answers
  • Chromosomal rearrangements are considered large-scale mutations. Point mutations are considered small-scale mutations, and are o
    5·1 answer
  • Brown eye color in fruit flies is caused by a variation in a gene. What are two possible sources of this genetic variation?
    12·1 answer
  • Which of the following is NOT true of the grass in the pasture story
    6·1 answer
  • What is the role of chlorophyll is photosynthesis?
    7·1 answer
  • Which 2 Forces Drive the rock cycle
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!