Which of the following is a greenhouse gas?

The Hawaii islands are a well-known example of ______________ succession.

1. Primary succession
2. Secondary succession
3. Degradation succession
4. Cyclic succession

Which of the following lake was formed after a natural disaster?

1. Lake Superior
2. Attabad Lake
3. Lake Victoria
4. Lake Baikal

The  _________is the stable community at an ecosystem's equilibrium state.

1. Intermediate community
2. Final community
3. Climax community
4. Stable Community

Identify the invasive species.

1. Kudzu
2. Allamanda
3. Bougainvillea
4. Flame plant

In which of the following areas secondary succession would take place?

1. Newly created freshwater lake
2. Newly formed rock
3. Forest destroyed by wildfire
4. Newly cooled lava

In an ecosystem, the development of pioneer species is immediately followed by the development of _______________

1. Intermediate species
2. Pioneer species
3. Climax community
4. Biological Species

In an ecosystem, plants are categorized as

1. Producers
2. Primary consumers
3. Herbivores
4. Decomposers

_________________ ecosystem has maximum amount of biomass.

1. Lake
2. Dessert
3. Pond
4. Forest

The angle made by the reflected ray with the normal is 42 degrees. The angle of incidence is ____ degrees.

An incident ray makes an angle of 30 degrees with the reflecting surface. The angle of incidence is ____ degrees.

An incident ray makes an angle of 30 degrees with the reflecting surface. The angle of incidence is ____ degrees.

An incident ray goes along the normal. Its angle of incidence is ____ degrees.

The two laws of reflection of light hold for reflection of light from _____.

1. Plane mirrors only
2. Concave mirrors only
3. Convex mirrors only Convex lens
4. All of the above

For a spherical mirror, a normal line at a point is drawn _____.

1. From the point at any angle
2. Perpendicular to the tangent at that point
3. Parallel to the tangent at that point Convex lens
4. None of the above