MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
D. Ceres
Explanation
In 1801, while making a star map, Italian priest and astronomer Giuseppe Piazzi accidentally discovered the first and largest asteroid, Ceres, orbiting between Mars and Jupiter.
Correct answer
C. Venus
Explanation
Venus has the longest day of any planet in our solar system. It completes one rotation every 243 Earth days. Its day lasts longer than its orbit. It orbits the Sun every 224.65 Earth days, so a day is nearly 20 Earth days longer than its year. Venus looks like a very active planet. It has mountains and volcanoes. Venus is similar in size to Earth. Earth is just a little bit bigger. Venus is unusual because it spins the opposite direction of Earth and most other planets. And its rotation is very slow. It takes about 243 Earth days to spin around just once. Because it’s so close to the sun, a year goes by fast. It takes 225 Earth days for Venus to go all the way around the sun. That means that a day on Venus is a little longer than a year on Venus.
Correct answer
A. seeds
Explanation
seeds is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Plasma
Explanation
Plasma is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Chromite
Explanation
Chromite is important because it is the only economic ore of chromium, an essential element for a wide variety of metal, chemical, and manufactured products.
Correct answer
C. zero
Explanation
zero is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Jupiter
Explanation
Active asteroid discovered near Jupiters Orbit for the first time in billion years. The Jupiter Trojan asteroids orbit the Sun in two huge swarms, one swarm orbiting ahead of the planet, where 2019 LD2 is present, and the other swarm orbiting behind it.
Correct answer
A. Physics
Explanation
Physics is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Sphenopsids
Explanation
Sphenopsids is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. The Frigid Zone
Explanation
The Frigid Zone is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.