SCIQUIZIZZ BEE

1. Which among the following metals is the hardest metal?

• Iron

• Gold

• Tungsten

Answer explanation

Tungsten has the highest tensile strength of any natural metal, with an ultimate strength of 1510 megapascals. Tungsten has the highest melting point (3422 °C, 6192 °F), lowest vapor pressure (at temperatures above 1650 °C, 3000 °F)

2. Identify the process from the options below, which is a physical change?

• Oxidation

• Reduction

• Sublimation

Answer explanation

Sublimation describes a phase transition where a substance changes from a solid directly to a gas, bypassing the liquid state. This physical transformation is distinct from chemical changes like oxidation or reduction.

Which one of the following organs converts glycogen into glucose and purifies the blood?

• Kidney

• Lungs

• Liver

Answer explanation

4. At what temperature are Celsius and Fahrenheit equal?

• -40

• -35

• 40

Answer explanation

The Fahrenheit and Celsius scales are numerically equal at -40 degrees. This means that -40°C is the same as -40°F. 

5. How many teeth does an adult human have?

• 31

• 32

• 33

Answer explanation

Adults have 32 teeth. You should have this full set of adult teeth by your late teens.

Adult teeth include incisors, canines, premolars, and molars

6. What was the name of the first artificial satellite created by a Filipino?

• Diwata-1

• Lakbay-Uno

• Bathala-1

Answer explanation

The first artificial satellite designed and built by Filipinos was named Diwata-1, also known as PHL-Microsat-1, and was launched in April 2016. 

7. What is the only letter not to appear on the periodic table?

• Z

• J

• W

Answer explanation

The letter "J" is the only one not found on the periodic table. In some countries (e.g., Norway, Poland, Sweden, Serbia, Croatia), the element iodine is known by the name jod. However, the periodic table still uses the IUPAC symbol I for the element.

8. Born in the ocean and white as snow.
   When I fall back to water I disappear without a trace.
   What am I?

• Corals

• Salt

• Sand

9. What is black when you buy it, red when you use it and gray when you throw it away?

• Coffee

• Charcoal

• Pepper

10. Roughly how long does it take for the sun's light to reach Earth?

• 7.3 minutes

• 8.3 minutes

• 9.3 minutes

Answer explanation

Sun rays have to travel of distance 150 million km while speed the of light is equal to 300000 km per second. So it takes 8.3 minutes or 500 seconds.