Question

1. what is the first step of a scientific investigation? a. asking a question b. testing the hypothesis c. making observations d. drawing conclusions 2. what characteristic must a hypothesis have? a. it must be provable b. it must be falsifiable c. it must always be correct d. it must be based on imagination 3. what is a logical prediction made during an experiment called? a. conclusion b. observation c. hypothesis d. prediction 4. which of the following is crucial when communicating scientific results? a. exaggerating findings b. omitting possible errors c. explaining methods and limitations d. ignoring peer review 5. why can conclusions in science never be considered absolute truth? a. because experiments are always flawed b. because science is open to new evidence c. because hypotheses are often false d. because observations can be biased 6. which type of electromagnetic radiation has the highest energy? a. infrared b. gamma rays c. radio waves d. ultraviolet light 7. what happens to light waves when redshifting occurs? a. they gain energy b. they lose energy c. they move towards the blue side of the spectrum d. they stop moving 8. what type of radiation is primarily used to study very hot celestial objects? a. x - rays b. infrared c. radio waves d. visible light 9. why are space - based telescopes advantageous for studying the universe? a. they are cheaper to operate b. they avoid atmospheric interference c. they focus on radio waves d. they require less maintenance 10. which part of the electromagnetic spectrum is used by human eyes to observe the world? a. infrared b. ultraviolet c. visible light d. gamma rays 11. where are stars born? a. in black holes b. in galaxies c. in a nebula d. in planets 12. what is the approximate age of the universe, according to the big bang theory? a. 4.5 billion years b. 13.8 billion years c. 100 million years d. 10 trillion years 13. what force holds the universe together? a. electromagnetism b. gravity c. nuclear fusion d. dark energy 14. what happens when a meteoroid enters earths atmosphere? a. it becomes a meteor b. it turns into an asteroid c. it becomes a comet d. it forms a black hole 15. which shape does our milky way galaxy have? a. irregular b. elliptical c. spiral d. spherical 16. which country launched the first artificial satellite, sputnik? a. united states b. soviet union c. china d. france 17. who was the first human to walk on the moon? a. yuri gagarin b. john glenn c. buzz aldrin d. neil armstrong

Explanation:

1. The scientific - method starts with asking a question.
2. A hypothesis must be falsifiable to be scientifically valid.
3. A logical prediction in an experiment is a hypothesis.
4. Explaining methods and limitations is crucial in communicating scientific results.
5. Science is open - ended and new evidence can change conclusions.
6. Gamma rays have the highest energy in the electromagnetic spectrum.
7. Redshifting indicates that light waves lose energy.
8. X - rays are used to study very hot celestial objects.
9. Space - based telescopes avoid atmospheric interference.
10. Human eyes use visible light to observe.
11. Stars are born in nebulae.
12. The approximate age of the universe according to the Big Bang Theory is 13.8 billion years.
13. Gravity holds the universe together.
14. When a meteoroid enters Earth's atmosphere, it becomes a meteor.
15. The Milky Way galaxy is a spiral galaxy.
16. The Soviet Union launched Sputnik.
17. Neil Armstrong was the first human to walk on the Moon.

Answer:

1. A. Asking a Question
2. B. It must be falsifiable
3. C. Hypothesis
4. C. Explaining methods and limitations
5. B. Because science is open to new evidence
6. B. Gamma rays
7. B. They lose energy
8. A. X - rays
9. B. They avoid atmospheric interference
10. C. Visible light
11. C. In a nebula
12. B. 13.8 billion years
13. B. Gravity
14. A. It becomes a meteor
15. C. Spiral
16. B. Soviet Union
17. D. Neil Armstrong