STEM WEEK 3 Challenge

Which of the following mixture will cause the biggest explosion?

• Mg + HCl
• Cs + water
• Na + water
• Ca + HCl

The same charge will ............

• attract
• repel
• nothing happend
• I don't know

The charge of one electron is ................

• 1.6 × 10^-19 C
• 1.6 × 10^-19 A
• 1.6 × 10^19 C
• 1.6 × 10^19 A

Which of these numbers is less than its reciprocal?

• -2
• -1
• 1

I'm thinking of two whole numbers. Their product is 24 and their sum is 11. What is the larger number?

• 3
• 4
• 6
• 8

What is one the hardest metals, and is used to build spacecraft?

• Gold
• Uranium
• Titanium
• Lithium

Which part of your diet is key to growing muscle?

• Carbohydrates
• Fat
• Sugar
• Protein

Aunt Anna is 42 years old. Caitlin is 5 years younger than Brianna, and Brianna is half as old as Aunt Anna. How old is Caitlin?

• 15
• 16
• 17
• 21

Each principal of Lincoln High School serves exactly one 3-year term. What is the maximum number of principals this school could have during an 8-year period?

• 2
• 3
• 4
• 5

Why can't you trust an atom?

• They're always in a split decision.
• They make up everything.
• They're never positive.
• They don't like bonding.