Question

Our journeys into outer space brought us closer to understanding the universe. They also left behind numerous pieces of garbage known as “space junk” that pose threats to spacecrafts and space stations. This orbiting dump includes thousands of nuts, bolts, gloves, and other debris. Data from a 1999 study indicate there around 110,000 objects larger than 1 centimeter orbiting the Earth left from our ventures into space. Even the smallest of these could do serious harm to a satellite or space-based telescope. It could also threaten the lives of those aboard the International Space Station. U.S.

Answer 1

@iGreen

Answer 2

What does the author use to support the idea that space programs have left behind a lot of debris?
The author refers to a study that estimated the number of space junk objects.
The author quotes statistics on how many pieces of space debris have struck spacecraft.
The author uses personal experience to describe the extent of garbage in space.
The author quotes scientists and other experts who give their views about space junk.

Answer 3

@iGreen

Answer 4

Hold on, I'm getting so many mentions...

Answer 5

Oh Ok

Answer 6

What does the author use to support the idea that space programs have left behind a lot of debris?

He says right here, with proof:

Data from a 1999 study indicate there around 110,000 objects larger than 1 centimeter orbiting the Earth left from our ventures into space.

Answer 7

Therefore the answer is A..

Answer 8

Thx Can you help on {some} More

Answer 9

B sounds right but it says 'that STRUCK aircraft' there wasn't a study on strikes on aircraft.

Answer 10

Sure.

Answer 11

Coral reefs are underwater habitats made from limestone secreted by coral. (2) These rich ecosystems are formed when coral polyps, which are tiny animals living in colonies, die and leave behind a branched, stony material. (3) The reefs made from this material provide a home to many animals including sponges, sharks, eels, jellyfish, anemones, sea stars, shrimp, and turtles. (4) Some of these animals are on endangered lists, and marine biologists are struggling to help them thrive.
(5) Unfortunately, many coral reefs are dying. (6) Threats to the reefs include water pollution from sewage and agricultural waste, dredging of the ocean floor near the coast, or collecting of coral in a careless manner. (7) In addition, man-made projects can deprive coral reefs of light, which they need to survive. (8) Projects related to mining or construction can cloud the waters which blocks the light and kills coral. (9) Finally, global warming has damaged a lot of reefs in the world. (10) Even a one-degree change can cause the degradation of a reef.

Answer 12

Which sentence in the first paragraph least supports the main idea?
Some of these animals are on endangered lists, and marine biologists are struggling to help them thrive.
The reefs made from this material provide a home to many animals including sponges, sharks, eels, jellyfish, anemones, sea stars, shrimp, and turtles.
These rich ecosystems are formed when coral polyps, which are tiny animals living in colonies, die and leave behind a branched, stony material.
Coral reefs are underwater habitats made from limestone secreted by coral.

Answer 13

Hold on, I'm getting so many mentions.