Which statement best describes a theory?
a. A group of ideas about how something should be done, made, or thought about
b. A specific statement about nature that needs further testing
c. An idea considered so obviously true that the idea does not need to be questioned
d. A fundamental principle in which scientists have great confidence
e. A general description of some aspect of nature that has been thoroughly tested and widely accepted
e
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The coronal gas in the interstellar medium has very high temperatures similar to the Sun's corona
a. True b. False Indicate whether the statement is true or false
Calculate the pressure exerted on the ground due to person standing on one foot if the bottom of the person's foot is wide and long
A) 2.1 × 104 Pa B) 2.2 × 103 Pa C) 4.8 × 104 Pa D) 5.3 × 104 Pa
The ionic compound made of Fe3+ and CO32- ions would have the formula
a. Fe3(CO3)2. b. FeCO3. c. Fe2(CO3)3. d. none of these
Falling stars and shooting stars are simply other names for meteors
Indicate whether the statement is true or false