7. Similar rock formations have been discovered in Brazil and South Africa. These rock formations were formed at the same time and are made of the same types of rocks. What could explain how
these rocks got so far apart?
a
Brazil and South Africa are parts of different plates. The plates were sometimes pushed far
apart by earthquakes, and soft, solid rock from underneath got added to the edges of the
plates.
b
Brazil and South Africa are parts of different plates. The plates floated away from each
other across the ocean.
с
Brazil and South Africa are parts of different plates. The plates slowly moved apart as new
plates from underneath got added between them over millions of years.
d
Brazil and South Africa are parts of different plates. The plates slowly moved far apart as
soft, solid rock from underneath got added to the edges of the plates over millions of years.

In tossing one coin 10 times, what are your chances for tossing a head? a tail? 2. in tossing one coin 100 times, what are your chances for tossing a head? a tail? 3. in tossing one coin 200 times, what are your chances for tossing a head? a tail? deviation = ((absolute value of the difference between expected heads and observed heads) + (absolute value of the difference between expected tails and observed tails)) divided by total number of tosses. this value should always be positive. 4. what is the deviation for 10 tosses? 5. what is the deviation for the 100 tosses? 6. what is the deviation for 200 tosses? 7. how does increasing the total number of coin tosses from 10 to 100 affect the deviation? 8. how does increasing the total number of tosses from 100 to 200 affect the deviation? 9. what two important probability principles were established in this exercise? 10. the percent of occurrence is the obtained results divided by the total tosses and multiplied by 100%. toss the coins 100 times and record your results. calculate the percent occurrence for each combination. percent head-head occurrence: percent tail-tail occurrence: percent head-tail occurrence:

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline. which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used