Sparks Challenge Round 2

Which human activity is least likely to reduce biodiversity in a forest ecosystem?

• deforestation

• planting same type of crops

• building a dam that floods forest

• Introducing a variety of native plant species

Which of the following best explains why energy is lost at each trophic level in a food chain?

• Energy is converted into matter.

• Some energy is used to digest food only.

• Energy is lost in movement, heat, and excretion.

• Producers only store solar energy from a short time

Which circuit will cause two bulbs to shine the brightest?

• Two bulbs connected one after another to one battery

• Two bulbs connected side by side (parallel) to one battery

• One bulb connected with two batteries

• Two bulbs with no battery

A plastic spoon, a wooden stick, a metal key, and a rubber eraser are tested in a circuit. Which one will let the bulb light up?

• Plastic spoon

• Wooden stick

• Metal key

• Rubber eraser

Which of the following is a correct match between the rock type and how it is formed?

• Igneous – formed by pressure and layers over time

• Sedimentary – formed from cooled lava

• Metamorphic – formed from heat and pressure on other rocks

• Sedimentary – formed from melted rock underground

Which rock would MOST LIKELY contain a fossil?

• Granite

• Marble

• Basalt

• Limestone

Which soil type holds the most water but has the poorest drainage?

• Sandy soil

• Clay soil

• Loam soil

• peaty soil

Sam is using a torch in a dark room. He points the beam at a shiny metal spoon and notices the light bouncing off in a specific direction.
What property of light is Sam observing?

• Light can pass through all materials

• Light bends when it enters metal

• Light reflects off smooth, shiny surfaces

• Light disappears in darkness

Ali builds a circuit using a battery, a bulb, and three wires. When he connects everything, the bulb doesn't light up. He checks and sees all parts are connected properly. Then he replaces one wire and the bulb lights up.
What most likely caused the problem?

• The bulb needed more batteries

• The battery was too weak

• One wire was made of a material that didn’t conduct electricity

• He connected the switch in the wrong place

Noor creates a simple circuit with two bulbs in a row (series circuit). She notices both bulbs are dim. When she removes one bulb, the other turns off.
Why did the other bulb turn off?

• The switch turned off both bulbs

• The battery ran out

• The circuit became open and electricity couldn’t flow

• The bulb exploded