Please write 3 lines about what Chris Hadfield did as a canadian astronaut

Which of the following is defined as combinations of soil particles that vary in size and shape?

Brian's school locker has a three-digit combination lock that can be set using the numbers 5 to 9 (including 5 and 9), without repeating a number. the probability that the locker code begins with a prime number is %. the probability that the last digit of the locker code is an odd number is %.

On nights when we see the new moon phase, what side of the moon are we seeing?